Usually, 5 gallon preform is around 600-750 grams for circulative mineral water bottle. After serching the overseas market, our engineer team developed a new product-5 gallon bottle only 300 grams. This water is used with a special feedwater pump. 6 cavity & 8 cavity hot runner 5 gallon preform mould, make our customers to be the leadr of 5 gallon preform & bottle industry.