Barebells Milkshake

£2.49 (per 330ml bottle), barebells.com

A simple ingredients list is always a good sign, and Barebells’ ready-to-go protein milkshakes are made up mainly of milk, water, milk protein and cocoa powder (plus a few sweeteners). They’re lactose-free and pack in 24g protein per bottle. Straightforward but delicious flavour options include Chocolate, Strawberry, Vanilla and Banana.