Let That Shiitake Go - Insulated Tumblers

DOUBLE INSULATED: This double-layered insulated structure keeps your beverage cold for 12 hours, or hot for 6 hours

QUALITY MATERIAL: This wine tumbler features an outer layer of 201 Stainless Steel, with an inner layer of 18/8 Stainless Steel. This tumbler is lightweight and strong, perfect for holding for any length of time.