TOMSHOO 400ML Portable Stainless Steel Water Mug Double Wall Heat Insulated Cup Camping Hiking Office Use High quality stainless steel, durable, heat resistant, non-toxic and non-corrosive. Stainless steel double wall, exquisite workmanship. Sealing gasket helps prevent from leakage. Cup lid can keep water warm and prevent from dust outdoors. Plastic handle for convenient use.