Large Improved Formula Bags Choice. Easily find formulas with the color of the boxes stickers. Recycled products. Applications include hard and big waste, kitchen, toilet, bathroom, restroom, hospitals, schools. Blue sticker is contractor formula and 1.6 mil, pink sticker is regular formula and .65 mil, yellow sticker is strong formula and .90 mil and orange sticker is extra-strong formula and 1.2 mil. EcoLogo[R].