ThermaS'well Technology: Insulated to keep beverages cold for up to 24 hours or hot for up to 12. Eco-Friendly: BPA-free and reusable. Triple-Walled: Vacuum insulated high-grade 18/8 stainless steel. Condensation-free grip. S'well is proud to support charity partners that protect our environment, bring clean water to the world's poorest communities, and fund research to live longer, healthier lives. Measurements: 17oz / 500ml