Grenade Energy Functional Energy Drink

From £1.99 (per can), grenade.com

Grenade Energy is a new addition to the brand, with three great-tasting flavours: Cherry Bomb (sour cherry flavour), Sun of a Beach (tropical pineapple, orange and coconut) and Berried Alive (strawberry and blueberry flavour). All are free from preservatives and artificial colours, and pack the same punch as two espressos. Each can is free from sugar and calories, while boasting 1,500mg BCAAs, plus electrolytes and B vitamins.