Drink tube kit with a wider hole and 50% faster flow than the previous model. It has an extremely high flow rate, self-closing HyFlo bite valve, long beverage hose, easy one-handed filling, easy cleaning, quick drying and access to beverage hose disconnection, tight shut-off valve and much more, Big Zip EVO is the best choice for travel, tourism , hiking, cyclists, etc. The self-closing HyFlo bite valve improves the flow together with the new beverage hose. The wide opening with a double Secure Slidelock cap simplifies filling, closes it securely and makes cleaning easier. Thanks to the antibacterial treatment of the bag (silver ions), odors and tastes do not remain in the hydrovac and protect clean water from mold and bacteria. The plastic holder allows easy filling with one hand.