Thermos vacuum insulation technology for maximum temperature retention, keeps cold up to 12 hours. • Kid-proof design – durable stainless-steel interior and exterior withstands daily wear and tear. • Exterior stays condensation free. • Non-slip, scratch resistant base adds durability. • Pop-up silicone mouthpiece is protected by a push button lid which is easy for kids to open. • Lid has an integrated flip-up carry loop.