Keeping your drinks cool or warm longer without sweating and leaking. This glass water bottle is resistant to thermal shock, preventing cracking in extreme hot or cold which can withstand the repaid temperature change of the water from -20 to 100. Resistant double layer glass bottle, don't need to care the erosion anymore. The Double Wall Tea Water Bottle can separate loose leaf tea and water easily. Steep your favorite loose-leaf tea or pick your favorite fruits to infuse in this sleek travel bottle, environmental and healthy, bring you a easeful life.