A bag-in-box system for use in dispensing a pumpable product

A bag-in-box system for use in dispensing a pumpable product includes a carton, a flexible thermoplastic pouch disposed in the carton, a spout joined to the pouch, a spout closure, and a pumpable product disposed in the pouch, the flexible thermoplastic pouch including an outer wall including a coextruded film having a polyethylene layer, a tie layer, and a polyamide layer, and a discrete inner wall including an ethylene polymer or copolymer, or a composition like that of the outer wall, the outer wall sealed to the inner wall at the perimeter of the pouch. Optionally, a discrete intermediate wall can be disposed between the outer wall and inner discrete wall of the pouch. The system can further include a pump operatively connected to the pouch and carton to dispense the pumpable product from the pouch. The system provides an alternative to current systems for dispensing pumpable products that often suffer from one of two problems: the occurrence of pin-holes due to flex-cracking in metallized pouch materials, and the use of coextruded multilayer barrier films in pouch construction that lack sufficient toughness in terms of burst strength.