KEEP YOUR FOOD FRESH FOR HOURS - Keep your drinks cold and don't let your sandwiches spoil with our ultra-thick foam core insulation technology. Our insulation will keep your food cold or warm for when you're taking on the daily grind. STOP WASTING VALUABLE SPACE - Don't sacrifice an inch inside your lunch bag. This bag is designed with a max-efficient, expandable side water bottle holder, inside mesh pockets, and a slim back pocket to leave you with plenty of room to pack all of your food and snacks for the entire day. http://www.baixiangjubag.com/insulated-bag/lunch-bag/