Come and see our amazing products. This production is made of 304 Stainless.It will keep drinks hot for up to approximately 4 hours and cold for up to approximately 8 hours.Your customers will love the look of these iridescent vacuum bottles.It is also BPA-free and include a screen printed or laser engraved imprint of your choosing. Pls confirm with us about the packing info, stock color and exact production time before placing your order.