Mountain Warehouse BPA Free 1L Plastic Bottle - Leakproof Screw Top Lid Water Bottle
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to 5 stars: These are the best stainless steel water bottles we tested. We recommend them without reservation. The wide mouth opening allows us to add ice cubes, while the spout lid ensures we can sip without soaking our shirts. Combined with the handy carrying loop, we recommend this bottle as your everyday go-to, especially if you work out often and need a basic bottle for the gym. Next, we select a set bottles to test for ourselves. To see how effective each bottle's insulation was, we fill them with ice and cold water. We use a liquid thermometer to measure the temperature of the water immediately after we pour it, 3 hours later, and 6 hours later, as the bottles sit on a sunny windowsill.
To help you stay hydrated, especially during busy days, we recommend investing in a functional water bottle that you can bring with you to the gym and the office. Stainless steel water bottles keep your water cold for hours, are better for the environment than plastic, and aren’t prone to breaking like glass water bottles can be. For a stainless steel water bottle that comes with a filter built in, we love this option from Brita. It filters out unpleasant tastes and odors, for fresh-tasting water with every sip. We like that the filter is included at a similar price to most other bottles on our list (although you'll need to replace it regularly to reap the full benefits, according to the brand).For a slim bottle that can slip into the cage on your mountain bike or indoor cycling bike, we recommend this Healthy Human's Thermos. Its double-walled insulation keeps our water cold for hours, while the lid has a convenient handle for rehydrating while you're on the go.
While the design may seem basic, we love how easy it is to sip from this bottle's wide mouth. It's also leakproof, for a tight seal you can rely on while traveling your favorite trails. But we noticed it tends to dent easily, so you may want to invest in a silicone sleeve from the brand to protect the base. Single-walled insulation means the bottle is made from a single layer of stainless steel. You won't find any single-walled bottles on our list because they don't stabilize temperature very well, meaning your water won't stay cold over time.We love the sleek design, which has a modern, angular shape and comes in a variety of bright colors and patterns. The 16-ounce capacity is solid for everyday sipping, and the low-profile lid is completely leakproof, for added peace of mind. Like Corkcicle's Canteen, S'well's Water Bottle features triple-walled insulation—perfect for keeping your tea or coffee hot all morning long. The brand claims the largest bottle can keep drinks cold for up to 48 hours and hot for around 18. While we didn't test the full extent of this range, the bottle did perform well in our temperature tests, keeping our water fresh and cold after three and six hours.