Shop All › Skittles & Skittles Sour - 400 MG (SALE) Image 1 of 1 Skittles & Skittles Sour - 400 MG (SALE) $12.00 A true classic, with plenty of skittles per bag; these candies are great for sharing. 400MG per bag. Call or Text Added! A true classic, with plenty of skittles per bag; these candies are great for sharing. 400MG per bag.