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A large insulated water bottle is one of those quiet wins for a busy day: fill it once in the morning and you are sorted for the school run, the desk, the gym or a long car journey, with cold water that stays cold for hours. The bigger sizes save you constant refills, which matters when you are juggling everything else. This one earns its place because it is sturdy, properly leakproof and holds enough to get you through a full day.
What to look for
- Double-walled stainless steel. Vacuum insulation is what keeps drinks cold all day and hot for hours, so it is worth paying for.
- A genuinely leakproof lid. A bottle that lives in a bag needs a seal you can trust, ideally with a few lid styles like straw, flip or screw top.
- A capacity that suits you. Around one litre covers most days, but bear in mind a full large bottle is heavy to carry.
Our pick
The bottle we would reach for is a large double-walled stainless steel one, roughly 1.2 litres, that comes with more than one lid so you can swap a straw lid for a flip or screw cap depending on the day. It keeps cold drinks cold for around 24 hours and hot ones warm for about 12, the wide mouth takes ice cubes easily, and it is well sized for adults at work, the gym or out walking. The powder-coated finish helps it survive being knocked about.
You do not need the priciest flask to drink more water. A solid mid-range one like this does the job for years, so spend on a lid style you will actually use rather than chasing the trendiest brand.