Buyneed Double Wall Vacuum Insulated Travel Mug & Bottle, Bringing Elegance To Your Home. By using buyneed innovative vacuum insulation technology, vacuum cup keeps air sucked out and create a vacuum between the double walls, minimizing the effect of outside temperature. Double-wall vacuum-insulated stainless steel now keeps beverages cold or hot for up to 12 hours. Great gift for any coffee drinking commuter! Keeps coffee hot for the entire commute! Coffee,Tea, Stainless steel mesh screen for loose tea leaves or fruit infusions more.