The strong and durable 350ml Camp Mug is constructed in double-walled, vacuum-insulated stainless steel with a powder coat finish, keeping it looking good on the outside and piping hot on the inside. The tri-mode tumbler lid slides open for flow control and is spill-resistant. A non-slip silicone pad on the base provides a soft landing on surfaces to avoid scratches and spills. Dishwasher safe and free of BPA, BPS, and BPF.