Come and Check Our Promo Solutions.This Large Capacity Backpack is ecomomic with a double deck back pocket, so you can keep your laptop, tablet, books, phone, etc inside. Its most important feature is that it can keep water or drinks warm, so you can drink boiling water even at the top of the mountain.Besides, you can also put your water glass, umbrella or power bank into the pocket designed on the side so that you could take it out easily when it is needed. Your LOGO or artwork can be imprinted on it. Pls check inventory and detailed info with us before placing your orders.