水壺

The squeeze valve on this one means I get a small sip or a full mouthful without unscrewing anything, which is perfect mid-run. 500ml fits my bike cage and the fish motif makes it easy to spot among everyone else's plain bottles.

The flying fish pattern is subtle enough that it doesn't look childish on my desk, and the press-to-drink mechanism means I'm not unscrewing a cap every five minutes. Water actually comes out in a steady stream instead of dribbling down my chin.

The 500ml size fits perfectly in my bag's side pocket, and that push-to-drink top means no unscrewing when I'm mid-workout. Water comes out at a steady flow instead of dumping everywhere, which I didn't expect.