We no longer have to suffer tepid tap water in a water bottle whilst out walking, in the gym or working in the office, or have to go out and buy expensive disposable bottles of water from the supermarket. The emergence of filtered water bottles have been a real game-changer and a fantastic solution to improve our health and promote water drinking. This article is designed to provide a strong overview of what a filtered water bottle is, how it works and offer a review of 8 of our favourites. This will hopefully save you the time of searching through countless websites and shops, making it easier to get your filtered water bottle and start a healthier, water-filled lifestyle. Our Top Picks Best Filtered Water Bottle of 2021: Filtered Water Bottle that are worth mentioning: Our Top 8 Filtered Water Bottles We\u2019ve scoured the market and tested some fantastic filtered bottles, bringing together 8 of our favourites. Whether you go for the one we recommend or feel another is right for you, it\u2019s always good to do further reading and research. 1. ClearlyFiltered Tritan Filtered Water Bottle A great start to our list, this filtered water bottle really lives up to its name, targeting 99.9% of potential contaminants in the water. Features: Not happy with offering fantastic health benefits, its sleek design wouldn\u2019t look out of place in the local gym or at the office. It is made from a BPA-free plastic material making it a lightweight solution. As an added bonus, you could fit ice cubes in the bottle if you so wished, with its wide opening. Design: So, with great filtration, nice design and lightweight feel, there aren\u2019t many downsides here, except perhaps a lack of colour choices and possibly not fitting in some bicycle drinks holders. Pros Cons \tMaintenance - East to look after and keep clean. \tFilter - Offers protection against 99.9% of harmful contaminants in the water supply \tIce - You can put ice in thanks to its helpful design \tSingle design - Unfortunately you can\u2019t choose from different designs or colours. 2. Epic Water Hydro Flask The second on our list is a little different - it is only a filter and not an actual bottle. Design: But we think this isn\u2019t a bad thing as its all about the filtration and gives you a little freedom to decide on the bottle you want, as they offer filters that fit both 32 and 40oz bottles. They have also listened to feedback and expanded the size of the straws, a big bonus to those people thirsty and in a hurry! Filtration: The filters offer similar claims to others, with 99.9% filtration of tap water and come in two different options: an urban model aimed at everyday use and an outdoor model, designing for filtering water found in the wilds during a hike or safari. Certification: They offer certifications with industry bodies for those very much conscious of seeing proof of filtration. Pros Cons \tMaintenance - Easy to clean and look after even whilst out travelling. \tCustomer Service - A great customer service team at the manufacturer will help with any problems you have. \tPerformance - Fully certified and offers up to 99.9% filtration of harmful contaminants. \tNo bottle - This doesn\u2019t come with a water bottle, so you will need to invest in one of those separately. 3. GRAYL Ultralight Water Purifier The team at GRAYL have gone for simple but effective with this filtered water bottle, once more using a filter that gets rid of 99.9% of bacteria such as cholera, salmonella and more. Design: The strength of this simple design is in its durability, making it a perfect option for those keen to spend time outdoors. Performance: It is a lightweight, convenient solution that everyone will find easy to use, with no complicated features or requirements designed to frustrate you. No gimmicks, just a clean solution that means you get tasty, healthy water when you need it. Pros Cons \tBuild quality - Made of lightweight, durable materials \tFiltration - Offers protection from 99.9% of harmful bacteria and viruses \tSimple design - A great, uncomplicated design that just does its job and does it well. \tEasy of use - It isn\u2019t as easy to carry as some of the other filtered water bottles. 4. SurviMate Filtered Water Bottle BPA Free The SurviMate stands out from the crowd because as standard, they supply four different types of filter. Filtration: That\u2019s right, you get four of them, designed for different environments and situations to make sure you stay safe and enjoy water wherever you are. The filters include two medical-grade filters, a coconut shell activated carbon filter and then one made of antibacterial beads. Design: Made of strong, lightweight material, it will be a fantastic investment for anyone looking for a long term solution. Maintenance: The filters state they last approximately 8 months, so you won\u2019t need to buy replacements very often at all. Plus it looks good and is easy to carry! Pros Cons \tFiltration system - This bottle comes with four filters for some of the cleanest, safest water you can get in a water bottle. \tQuality - It has been well designed and the build quality is impressive. \tFilter lifespan - These replaceable filters last for approximately 8 months. \tEasyNo options - You can\u2019t choose from different options with this model. 5. LifeStraw Go Water Filter Bottles Our next filtered water bottle is the LifeStraw Go and it has an interesting feature of filtering in two stages whilst you\u2019re drinking water. Filtration: The first stage is when the activated carbon filter cleans the water of 99.9% of bacteria and the second stage is designed to minimise any chlorine and aftertaste in the water. Clearly, the second stage is less important, it\u2019s a nice bonus to improve the taste of your water, whilst also making it healthier. Capacity: The bottle can hold 23 ounces of water, made from BPA-free plastic and a silicone mouthpiece. Its filters can remove bacteria for up to a massive 4,000 litres of water, meaning it will last for a very long time, however, the second stage only lasts for 100 litres, so you will see a taste difference fairly quickly. Pros Cons \tFilter process - This bottle filters water as you drink it, making it more efficient than some other models. \tPerformance - It will remove 99.9% of harmful bacteria and parasites in the water supply. \tSafety - It has been made using BPA-free plastics and food-grade silicon. \tFilters - Whilst the main filter works for up to 4,000 litres, the second filter that removes chlorine only works for 100 litres. 6. Brita 20 Ounce Sport Water Bottle One of the biggest brands in water filters and coolers of all shapes and sizes, Brita have delivered a simple, yet effective filtered water bottle that has made it onto our list. Design: It is slightly smaller than some of the others, but we see that as a potential bonus for those who don\u2019t wish to drag around a heavy water bottle all day. Filtration: It\u2019s activated carbon filter performs well in tests and doesn\u2019t let you down, targeting both bacteria and also the taste of the water. Maintenance: Made of sturdy plastic and a filter that only needs replacing at the equivalent of 300 bottles of water, that\u2019s a pretty good financial saving, as well as helping out the environment. Pros Cons \tBuild quality - Made from tough plastic so it won\u2019t be a problem if dropped whilst using it. \tFilter - Activated carbon does well at removing harmful bacteria and reducing chlorine in your drinking water. \tFlip-open straw - Easy to drink when on the move. \tSize - Perfect for sports but at 20 ounces, may not be enough for those that want larger containers for long hikes. 7. KOR Nava BPA Free 650ml Filter Water Bottle One of the most stylish and interesting filtered water bottles on our list, the KOR Nava really does tick all the boxes for design, features and performance. Design: It is a sleek, 650ml water bottle that will fit easily into gym bags, hiking equipment or simply your hand as you walk along. It offers all the usual filtration performance you\u2019d expect, using an activated carbon filter made of coconut shell. Water Flow: An interesting feature of this product is its so-called Easy Flow technology, which means that you don\u2019t need to try and squeeze the bottle or suck the straw to get water. You just have to drink it as normal and we think this is a pretty nice touch. Bolt-on a cap designed to stop leaking and quick access, what\u2019s not to love. Pros Cons \tDesign - A great design that makes it stand out from other normal water bottles. It is easy to carry and fit into rucksacks or gym bags. \tFast flow rate - Thanks to its innovative technology, you can drink the water easily without pressure. \tSafe and secure - You won\u2019t get any leaks with this model and the water bottle has been tested and certified. Made with BPA-free plastic \tPrice - not one of the cheapest on our list but definitely performs well. 8. WaterWell Travel Water Bottle The team at WaterWell have aimed this at the hikers, the travellers and explorers who may worry about where they will be able to get water, when out and about in the wilderness. Design: It is made with a filter that lets you fill up from anywhere including a puddle or river and you will be able to drink clean, filtered and safe water. Filtration: Offering the standard 99.9% magic number for filtration, it means you can carry this around with you and forget about extra bottles or heavy back up supplies. Maintenance: The filter is said to filter up to 1000 litres before it needs replacing, more than enough for a long journey and saving incredible amounts of plastic going into the environment. Pros Cons \tFilter - This bottle has been designed to work with water from puddles, rivers and any other source of water. \tLongevity - The filter will last up to 1000 litres which is as many as 2000 normal water bottles you would buy from a shop. \tEasy to use - Very simple, just flip it open, bite and sip the water. \tFlow rate - Due to the impressive filtration, it is harder to drink from than other models. 9. Invigorated Water Store Filtered Alkaline Water Bottle A truly stylish stainless-steel filtered water bottle now that combines performance with environmentally friendly practices. Design: These guys haven't used plastic like most other manufacturers but chosen an insulated stainless-steel build instead. It really does look great as well as standing the test of time and reducing plastic waste. It will also keep the liquid at the same temperature for between 12 to 24 hours. Filtration: This stainless-steel water bottle will remove chlorine, heavy metals and other contaminants, as well as reducing any fluoride found in the water supply. Furthermore, it will help add in essential minerals, improving both the taste and smell of your drinking water. Maintenance: Each alkaline packet or pouch you get will filter approximately 16 gallons of water, which is the equivalent of 144 normal plastic bottles of water. That is a good performance level compared to other filters for water bottles. Pros Cons \tA stylish stainless-steel design that reduces plastic waste and lasts a long time \tKeeps drinking water warm for 12 hours and cold for 24 hours \tEach filter inside works for 16 gallons of drinking water, which is the equivalent of 144 bottles. \tIt isn't that easy to get the alkaline filters out when you need to replace them and can be a bit fiddly to do. 10. GRAYL Geopress Filtered Water Bottle The last filtered water bottle making it onto our best filtered water bottles list is this impressive bottle from GRAYL. They really have delivered with this one. Filtration: Not only does this water bottle filter out bacteria and protozoa found in most untreated water supplies, but it will also get rid of viruses, chemicals, heavy metals and more! This really does put it at the top of the list in terms of a water filtration bottle without any kind of pump or power requirements. Maintenance: The filter in this water bottle will last for approximately 65 gallons of water, depending on the quality of water involved. This is far beyond most other water bottles out there and makes it great value for money, despite its price tag. Design: A stylish, 24-ounce water bottle means it not only performs well at water filtration but looks great in your bag or on the desk at work. Easy to operate with a simple design and a handle to make it easy to carry on long walks or camping trips. Pros Cons \tEach filter lasts for an impressive 65 gallons of water \tHighly effective at filtering bacteria, viruses and harmful contaminants like heavy metals leaving clean water to drink \tThis water filter bottle will hold 24 ounces of water \tOne of the most expensive water bottles on the market Summary As you can see from our article, we are massive fans of a water filter bottle and it is something we recommend to everyone. Not only does it promote drinking more water and a healthier diet, it truly does protect you from harmful bacteria and saves the mountains of plastic that is polluting our environment. No matter the choice you make, they will almost all offer the similar kind of protection and functionality, so just make sure it looks right, feels right to carry and you will be on to a winner. How they work It is all about the filtration system which makes these water bottles stand out from the normal water bottles and an easy way to think it about it is that each filtered water bottle follows three main steps in its creation and filtration process. It all starts with carbon becoming activated and then in the water bottle, it adsorbs and filters what you don\u2019t want to drink. Activated Carbon The vast majority of filtered water bottles will use a filter made of carbon (some will use UV but these are a more expensive, battery-powered device), which uses a source of activated carbon, such as charcoal. The purpose of this is to remove any impurities that may be present in your water source. It becomes activated carbon by being changed inside a furnace, creating a greater surface area and more porous surface area, allowing the full filtration process to take place more efficiently. Adsorption This aspect of water filtration is all about binding any elements in the water to the activated carbon, which in turn filters the water. The reason that activated carbon is used is because it has a far greater amount of binding sites when compared to normal carbon sources, making it a more efficient method for filtering those harmful contents. Filtration Put simply, this means the carbon filter is absorbing everything that is harmful in the water, removing potential bacteria or minerals that could be harmful. The performance of the filtration system is key and so filters should be regularly replaced, as per the guidance from the manufacturer. If you don\u2019t, then you are simply not getting the benefits of a filtered water bottle and protecting yourself from harm. Pros There are plenty of pros to buying and using a filtered water bottle and it is important to note that these will in general, always outweigh the cons. But it is important to be balanced and think about both sides, so let\u2019s start with the pros: Price One of the most persuasive reasons for buying a filtered water bottle is the financial savings involved. Imagine how much you spend on disposable water bottles and replace this with a one-off investment for a filtered water bottle. Apart from the odd filter replacement, you will be saving money in no time! Health As highlighted in our initial section on how a filtered water bottle works, it\u2019s all about filtering out the harmful minerals and bacteria in water. This makes it a no-brainer from a health perspective, always knowing that the water you\u2019re drinking is about as healthy for you as you will be able to get. Environment The world is becoming more and more aware of the impact plastic and waste is having on our environment and single-use plastics are one of the main issues at the moment. If you can replace this with purchasing a single filtered water bottle, then you will stop a lot of plastic from being created and thrown away. Travelling Whether you are travelling to work, going for a walk or on a trip around the world, having a filtered water bottle with you is so important. You may be in a location that doesn\u2019t have a shop or the local water supply isn\u2019t that trustworthy and so this will give you a bit more peace of mind and filter out some of the bugs that may be present in water supplies. Cons As mentioned, there are some cons to choosing a filtered water bottle and as a result, it may not be the best choice for your specific situation. Using a straw The majority of filtered water bottles have a straw built into them because it forms part of the filtration system, not the bottle itself. Some may not mind this but for others, it may be a little frustrating. Size For some of the more active people out there, they may find the sizes of the filtered water bottles a little small. For most of us, they are actually just as big, if not bigger than shop-bought water bottles, so this won\u2019t bother many. Materials These bottles will be made from a variety of materials including heavier stainless steel, so some will be too heavy for people to use regularly. You will want to do a bit of research and find the right sort of bottle for you, otherwise, it could become a bit of an annoyance after investing in one. Frequently Asked Questions We've put together some of the most frequently asked questions about filtered water bottles, along with some short answers to help you navigate through the buying process. Can you put them in the dishwasher? \t\t\t \t\t\tYou need to be very careful with putting water bottles in the dishwasher, so our recommendation is always checking with the manufacturer instructions first. Whilst most are dishwasher safe, some tell you to put them on the top rack or take out parts of the filtration system first. \t\t \t \tWhich brand is the best to go for? \t\t \t\t\tThere are some fantastic brands out there, including the well-known manufacturers like Brita and Grale. However, there are some great products out there right now from other brands so don't feel you need to stick to a specific one. You just need to make sure that the bottle provides everything you need, offers a good warranty and has plenty of positive feedback from customers. \t\t \t \tHow much do I need to spend? \t\t \t\t\tThis is a difficult question to answer because it very much depends on the type of water filter bottle you need. You can go for relatively basic water bottles, or go for more stylish, higher capacity ones that will filter out more harmful contaminants. You can even go further and get ones that add in minerals to improve the taste and smell of the water you are drinking. \t\t \t \tCan I put the bottles in the fridge or freezer? \t\t\t \t\t\tAnother situation where you should be very careful and check with the manufacturer first. In all likelihood, putting them in the refrigerator will be absolutely fine, but you shouldn't put them in the freezer because it will damage the filter. It will most likely mean the membrane inside gets damaged and either lower the performance or results in you having to replace the filter. If you want ice-cold drinks, look for a water filter bottle that will allow for ice cubes to fit inside.