Hydroflask insulation in a refined 10oz tumbler that is comfortable to hold. TempShield™ insulation keeps cold drinks cold for up to 24 hours and hot drinks hot for up to 6 hours. Insulated press-in lid features Honeycomb insulation™ for additional temperature control. Durable 18/8 Stainless Steel construction, BPA-Free and Phthalate-Free. Lifetime Warranty.