Customized Water Bottle Thermos 350ml vacuum flask,slim insulated water bottle,350ml,500ml available Easy lock lid - Made with one hand, easy to lock and easy to release lid for quick and easy drink access Double Wall Vacuum Insulation - Excellent heat preservation system, 60 degrees heat preservation for about 8 hours, 40 degrees heat preservation for 15 hours. It depends on the temperature at which you refill the bottle and how many times you open it or the outside ambient temperature.
http://www.lvtengbottle.com/water-bottle/
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