Water bottles and tumblers buying guide

The right bottle is the one you will carry every day, so lid, weight and cleaning matter.

1. Double-wall stainless steel keeps drinks cold or hot for hours; single-wall is lighter but does not insulate.
2. A wide mouth is easier to clean and fill with ice; a narrow mouth is easier to drink from on the move.
3. Check that the lid is leak-proof if you carry it in a bag, and whether it can go in the dishwasher.
4. Look for food-grade stainless steel or BPA-free plastic.
5. Fit in a car cup holder is worth checking before buying.

Common mistake: Choosing a bottle you cannot clean thoroughly.