This bottle is made of 100% food grade silicone passed FDA, LFGB test, durable and flexible enough to folding, foldable drink bottle are Non-toxic, BPA free and safe.Endure -60 to 200 Celsius, Great for hot and cold beverages, you can freeze or microwave it. It can be used as a mini pillow when you have a long flight.Perfect for work, school, gym, running, hiking, biking, boating.it's easy to open flip top. Foldable easy to carry.Anti-breakage.The promotional water bottle is available in a multitude of colors.