THERMOS Vacuum Insulated Can Cooler Holder 350ml Tumbler 2-way Used a few times. This is a can cooler holder for 350ml cans, and can also be used as a tumbler by attaching the included drinking spout. The vacuum-insulated structure keeps your drinks at the ideal temperature for a long time. It can be used in a wide range of situations, from indoors to outdoors. The body is made of stainless steel, the drinking spout is made of saturated polyester resin, and the packing is made of silicone. There are no major noticeable stains, but please understand that this is a used item and has been stored at home.