Ideal Gift - A great way to show you care with a gift that women or men will love. This reusable stainless steel water bottle makes the perfect gift for anyone looking to increase their water intake and reduce single-use plastic. TOPAHGOD's flask for hot drinks has been carefully sprayed with powder matte which is fashionable and timeless, choose our water bottle with cover as a gift for someone special on important birthdays, weddings, Christmas, anniversaries, or other celebrations. You probably wouldn't describe the scientific rigour as laboratory standard – but the tests did replicate the kind of environment you'd actually use these flasks in, either filling up your tea or coffee at the start of the day, or icing water. And the results were certainly interesting. While the cold water tended to record similar temperatures across products (with the exception of Klean Kanteen, which I'll get to), there was a significant degree of difference when it came to heat retention. My conclusion is that if you really care about keeping your caffeine hot, you should choose your insulated flask wisely. To help you choose which one to invest in, I tried and tested a selection of flasks that promise to keep your beverages colder and hotter for longer, measuring how much heat was retained or how cool they kept respectively over a period of 12 hours. My hot water was 92.3°C at 8:05pm, and by 8:05am it was 57°C – a temperature drop of 35.3°C after 12 hours. It’s still “warm” – just not as warm; and certainly not pipingly hot. My cold water with ice cubes is 5°C at 11:02 and 12 hours later its 3.5°C.

Unlike many flasks, it is also dishwasher safe – a big bonus in my book. The lid doubles up as a decent-sized cup and provides extra insulation; a handle on the side makes it easy to lug around and grip while battling the elements, but there’s no chance of leakage. While primarily made up of stainless steel, some parts are plastic – but it is BPA-free (an industrial chemical used in water bottles and similar that many people prefer to avoid). The strong stainless steel unbreakable double wall insulated material ensures that the contents is kept cold or hot for hours. The design features a integrated screw and a push button top for easy pouring. The flask is light and convenient to carry and it's easy to clean as the material wipes and washes with little effort. If you want to carry your flask long distances, it’s a lightweight option – weighing 400g (14 ounces) with canteen cap, or 380g (13.4 ounces) with sports cap, while empty.Keep your food and drink warmer or cooler with this fantastic Zento stainless steel bullet flask. The flask is perfect for keeping the contents within the flask hot or cold making it ideal for liquids such as tea, coffee, soup etc to take on the go to work, school etc or for camping and hiking. It comes with two cups with proper handles, so it's a great tea flask. It works well for families and small groups, making 5 or so generous servings. The twist stopper has a cunning hidden compartment in which to store milk or sugar; which I liked. Multi-Purpose Lid - After innovation, we have added a practical and creative cup lid design to the old-fashioned stainless steel water bottles. It is not only a cup lid but also a cute little teacup, there is also a handle for you to carry at any time. The inside of the lid is also made of high-quality and durable 304 material, bid farewell to the plastic lid on the market, which is healthy. The lid is designed for easy drinking, allowing you to easily replenish moisture anytime, anywhere. After Stanley, I found the Thermos – a brand which has become synonymous with insulated flasks – to come a close second in terms of heat retention.

How do Thermos flasks work? In short, they use a double walled construction, with the air removed from between these walls, forming a vacuum. Heat struggles to pass through the vacuum, meaning liquid stays at a roughly constant temperature. A big part of the appeal of the Stanley is that it makes you feel like an intrepid camper, thanks to the distinctive green branding. With a lifetime warranty, the iconic flask will survive even the wildest of adventures: since it was founded in 1913, Stanley bottles have survived -70 degree winds, 4,000 foot drops, speeding bullets and category 5 hurricanes (please do not try this yourself).Red Paddle Co manufacture paddle boards, but now they’ve also launched a versatile equipment range, Red Original. The kit can be used by anyone (no paddling required) and their marine-grade stainless steel water bottle is cleverly designed. The higher quality steel means it doesn’t corrode like other metal drinks bottles, and can withstand the elements. BUILT FOR LIFE: ‘Built for life’ is a motto Stanley stood by since 1913 with their promise to provide rugged, capable gear, built to last a lifetime; If your Stanley doesn't life up its legendary reputation we'll do what it takes to make it right The Stanley Classic is the Daddy of all insulated flasks, and with good reason. My hot water was 84.6°C at 7:51pm, and at 7:51 am it was 70.8 °C – a temperature drop of a mere 13.8°C after 12 hours (far less than its competitors, as detailed below). My hot water was 95.4°C at 7:56pm, and at 7:56am it was 76.3°C. That’s a temperature drop of 19.1°C after 12 hours. Meanwhile, my cold water was 4.5°C at 11:10am, and 1.5°C at 11:10pm.

My hot water was 93.6°C at 8:25pm, and I already had my suspicions, because the exterior was markedly hot compared to the others – a sure sign of heat escaping. At 8:25am it was 34.8°C – a significant temperature drop of 58.8°C after 12 hours. Unlike the other flasks, my cold water and cubes didn’t get colder – it got hotter. The marketing blurb says it keeps contents hot for 28 hours, or cold for 90 hours, which based on these results I can’t really see happening. The wide mouth means it’s also suitable for soups and smoothies to take to work, and it will certainly keep them either sufficiently cold or hot until lunchtime. It's available in a range of colours, which is fun, from canary yellow to baby blue via three shades of pink. Safe Material & High Capacity】FAPPEN Double Walled Vacuum Flask Thermo is made of food upgrade 304 stainless steel on both inside and outside walls, 100% BPA-free, which works better on anti-oxidation, corrosion resistance and temperature retention; It is a healthier choice as water bottle for tea, coffee, cold drink with ice cubes, etc. However, it is durable and robust and does come with a lifetime warranty. It weighs 723g, and if the environment is your number one priority, it’s still functional enough. Happy camping. One of its aims is to reduce the amount of plastic going into the ocean by encouraging the use of a steel bottle, so it is proudly 100pc BPA free.My gripe with this particular genuine Thermos brand flask (watch out for fakes) is that it is plastic on the outside and glass inside. The cups are plastic, too, rather than stainless steel. But like the Stanley it is BPA-free, and it kept liquids hotter than the other Thermos flasks I tried, which were composed primarily of stainless steel. It weighs 890g, which is lightweight considering its vast capacity.

Similarly to the likes of the Stanley, I like the aesthetic, and it also has a double wall construction to create a vacuum between the outside environment and inside liquid, helping to keep cold drinks cold or hot. The 750ml capacity holds around three cups of hot coffee (or the equivalent of a chilled bottle of white wine). EXTREMELY DURABLE: Our leak-proof thermos bottle has withstood speeding bullets, 4000 ft drops and category 5 hurricanes; The iconic style and rugged durability of this insulated bottle means it’s made to go anywhere Vacuum Insulated Water Bottle】Thanks to the premium coated copper on the exterior of the inner wall contributes to added insulation, This vacuum insulated drink flask can keep hot for 12 hours or cold for 9+ hours, greatly protect the liquid compartment from the hot or cold outside, achieving in reducing temperature transmission in maximum Our ranking system The TopChoice.co.uk Team selects top-of-the-line items from a wide selection and conducts rigorous evaluations on almost all the products available on the internet. We rank each product based on how well it matches our criteria.My hot water was 91.3°C at 8:36pm; at 8:36am it was 75.7°C – a temperature drop of 15.6°C after 12 hours (not that much more than the Stanley, and still piping hot enough for a decent brew). My cold water was 4.4°C at 11:13am, and as with the Stanley, 12 hours later it was even colder – at 1.7 °C. Vacuum Cup Flask Thermo,500ml Stainless Steel Insulated Water Bottle,Double Walled Travel Coffee Mug with Leakproof,Flask for Hot and Cold Drinks,Sports Water Bottle,for Work Sports Camping Cycling Stainless Steel Water Bottle, Insulated Travel Mug with Leakproof Cup Lid & Handle, 500ml Double Walled Vacuum Flask, Coffee Cup Drink Bottle Keep 12h Hot & Cold for Gym Home Office Outdoor, Blue HOT OR COLD FOR 32 HOURS: Fill the 1.9L thermal flask with water, coffee, tea or other drinks, whether you're at home, work or outdoors; The double-wall vacuum insulation of this thermos keeps all your drinks hot/cold for 32 hours and 160 hours with ice