The outer-shell and inner-bladder of this kind of beer keg are all plastic with PUR thermal layer. It can contain the fresh beer for 12 hours under common temperature, and if it is placed in refrigerator, the fresh-keeping function will be better. The advantages of 2L beer keg are lovely profile, convenient transporting, selling, and stacking for using special transporting boxes, and the best choice for selling fresh beer at home or in hotel.