[Tumbler] Materials: 18-8 Stainless steel (powder coating), TPE. [Lid, Spout] Materials: Polypropylene, Silicone. Upper temperature tolerance: 100℃/212℉. Keep drinks cold (6℃/43℉) for 6 hours. For maximum insulation efficiency, pre-cool the tumbler prior to use by filling in a bit of cold water for 1-2 mins. BPA Free. This is a tumbler for cold drinks ONLY.