Clif Bar Shot Bloks

£39.03 (pack of 18), wiggle.co.uk

If you’re not a fan of gels or find it difficult opening a sachet while running, these are the perfect answer. Convenient soft chews, they provide a quick carbohydrate fix with a little sodium and potassium added, but you do need to follow with a mouthful of water. Three bloks provide 24g carbohydrate and 100kcals.