Our say what? Insulated lowball tumblers will keep drinks cold for hours! These double-wall, stainless steel tumblers are vacuum insulated and include a leak and shatter-proof removeable plastic lid with slide closure. Bright, matte color tumblers feature witty sayings and make perfect gifts or souvenirs for friends, family or coworkers. Keeps iced beverages cold for up to 9 hours and hot for up to 3 hours. Use for wine, coffee or to enjoy a refreshing cocktail. Hand wash only. Bpa-free. Fda approved. California prop 65 certified.