Garnier Hair Food Banana 3 in 1 hair mask 400ml

A 3 in 1 banana hair mask you can use as a conditioner, a mask or a leave in treatment for dry hair. Amazon has the 400ml tub at £4, half its £7.99 RRP, and 10,000 people bought one in the past month. Superdrug's 390ml tub is £8.99, or £4.49 if you have a Health & Beautycard, so Amazon is cheaper either way.

Cheapest right now: Amazon, £4