FLUF's Organic Cotton "Zip Lunch" is made with 100% certified organic cotton and a tested food-safe lining (free of BPA, phthalates and lead). It's effortless, durable and easy to keep clean (machine washable with a wipe able, water-resistant lining). And with its zipper closure it'll keep everything in the bag, where it belongs. Guaranteed. Lunch bag is lined but not insulated. Please use a thermos or icepack, if necessary or desired.