Isothermal bag specially for the Gprokeg portable mini plastic kegs, it's common used for the Gporkeg 5L reusable mini kegs, 5L portable mini ecokeg, 3L portable mini ecokeg; without ice blocks, the cooled beer in the portable mini plastic kegs can be kept cool (under 10゜C) for about 4 hours; with ice blocks inside the isothermal bag (around 1kg ice blocks), the cooled beer in the portable mini plastic kegs can be kept cool (under 10゜C) for over 8 hours.

a pocket on the side of the isothermal bag for holding the dispensing tools; a hole on top of the isothermal bag for mounting the dispensing tool on the keg in the isothermal bag, no need to take the portable mini plastic keg out for dispensing, to keep the beer inside the keg always cool.