The superiority of our 5 gallon bottle caps: ■Our bottle caps are made of excellent PE material and meet the standard of food-rate. ■The material of foam cushion is non-toxic and dependable non-spill performance. ■The stick label sealed the top part of bottle cap can proof dust and forged. ■The scoring of bottle cap tears easily. ■Get the QS certificate of food package of China, FDA approved of USA.