9 layers laminated inner bag and specific spear for Gprokeg party kegs.

Multi layers of high barrier film for the laminated inner bag, to provide extremely high barrier to both O2 and CO2, for long shelf life as well optimal preservation of filled beverages.

Unique taste stability technology for the material used for the inner layer of inner bag which contact to the beverages, to keep the taste 100% stable during the whole shelf life for the filled beverages, especially for the filled beer.

All components of spear and inner bag which contact to beverages are sterilized by multi process: boiling and steaming, alcohol sterilization, ozone sterilization, and radiation sterilization, the whole spear and inner bag is free of microorganism (bacteria, virus, etc...)

All materials which intent to contact with beverages comply with relative norms of EU, FDA and Japanese norms, etc.

The 5L spear/inner bag is common used for both 5L reusable portable mini plastic keg and 5L ecokeg; the 3L spear/inner bag is only for the 3L portable ecokeg: