Tornado Pet Bottle Cover Holder Case Cooling Insulation 500ml Simple Black P-3217 Size: Approx. 8 x 8 x 19.5cm Material: Outer fabric/Polyester, Inner fabric/Aluminum, Core/Polyurethane foam, String/Polypropylene Country of origin: China For 500ml pet bottles Brand name: Torune Simple design pet bottle cover with cooling and insulation functions For 500ml pet bottles The aluminum lining inside effectively cools and insulates, and the top is a drawstring type, so the bottle won't easily fall out when closed. This is a brand new, unused item! Thank you!