500ml Insulated Water Bottle, Leak-Proof Matte Steel

Not if you seal it properly. Turn the cap until it stops, then invert the bottle over a sink for a few seconds before packing. A loose cap is the usual cause of leaks, so the twist matters more than anything else.

For commutes, desk days and a gym session, yes. Refill at the tap when you need more. The trade-off is worth it: a slim bottle goes everywhere with you, while a bigger one stays on the counter.

The soft-touch powder coat handles the knocks of a bag and a bike rack well. Hand wash with warm water and mild soap and skip the dishwasher, since heat and harsh detergent wear the coating and the vacuum seal over time.

You are paying for stainless steel, double-wall vacuum insulation and a matte finish that feels better in hand than cheap plastic. The bottle is built for roughly 1000 days of daily use, so the cost per day stays low. A plastic bottle that leaks or goes warm usually ends up in the bin sooner.