Show your Boston Red Sox pride with this Backpack & 18 oz. Water Bottle 2-Piece Set from Wildkin. This two-piece set contains a backpack and 18 oz. water bottle, perfect for staying hydrated on the go while toting your Boston Red Sox essentials. The backpack itself is made from durable polyester and features a mesh side pocket, a large zippered main compartment, and a smaller zippered compartment for extra organization.