Borosilicate Glass Drinking Bottle is great for everyday use with water, smoothies, juice and even mixed drinks. Take the bottle to the gym, on the go, to the office, hiking, and even camping. Borosilicate glass which is environmental and healthy material with BPA free. No need to warm the bottle up, could take up temperature difference. Fitting loop with lid makes no spill and safety to take in bags or at hands. Tested successfully 360 degrees leak-proof and safe to carry in bags.