This backpack is made from 16 water bottles of 500-ml. Padded laptop compartment protects laptops up to 15.5-in The bag can hold up to 30 lb Stay hydrated with your water in hand’s reach thanks to the two large external water bottle pockets. Their built-in heavy-duty elastic accommodates various bottle sizes The front pocket is perfect for storing small personal items for easy access The main compartment is conveniently accessible by opening the magnetic snaps without having to adjust the silicone feel straps Marin Collection 12-in x 5.5-in x 17-in Red Backpack