Insulated tumbler that'll keep your drinks hot or cold on the go. 3.0 x H9 in / 17 oz. Materials: 18-8 Stainless steel (powder coating) Polypropylene, Silicone. BPA Free. Keep drinks hot (69℃/156℉) for 6 hours. Keep drinks cold (7℃/45℉) for 6 hours. For maximum insulation efficiency, preheat or precool the tumbler prior to use by filling in a bit of hot/cold water for 1-2 mins.