Click & Collect › Diet Coke (330ml) Image 1 of 1 Diet Coke (330ml) £1.99 A cold can of Diet Coke.Allergens: none of the 14 major allergens.Dietary: Suitable for vegans and vegetarians. Add To Cart Added! A cold can of Diet Coke.Allergens: none of the 14 major allergens.Dietary: Suitable for vegans and vegetarians.