Concentrates/Other › Skittles & Skittles Sour - 400MG Image 1 of 1 Skittles & Skittles Sour - 400MG $12.00 A true classic, with plenty of skittles per bag; these candies are great for sharing. 400MG per bag. Add To Cart Added! A true classic, with plenty of skittles per bag; these candies are great for sharing. 400MG per bag.