Ion8 Vacuum Insulated Steel Water Bottle, 500 ml/18 oz

Was up to £19.99 at some point, and mostly above £15. Kid had one (plastic version without insulation) and it was a good water bottle that survived plenty of drops - it eventually started leaking because I lost a silicone piece while washing the cap. Customer service was good and shipped me a free replacement piece.

Missed out on the Thermos deal at around the same price. Figured this was a decent insulated bottle that only requires one-handed operation. I wanted something that wasn't a twist cap style top or straw type (too much cleaning).