These Combo Coolers can be used multiple ways! Use the slide-closure lid to turn it into a cup, or secure any can or bottle with the twist-on holder to keep your hands dry and your drinks cold! Vacuum Insulated. Cold up to 12 hours and hot up to 9 hours. 304 Grade - 18/8 Stainless Steel. BPA Free, Twist-On Slide-Closure Lid or Plastic Grey Holder. Copper Coated Insulation. Sweat Free. Holds 12oz and fits most cans or glass bottles.