16 oz stainless steel mug with leak-proof design using QuadVac™ technology. - Brand: STANLEY - Model Name: NEVER LEAK MUG - Capacity: 16 oz (474 ml) - Material: 18/8 Stainless Steel, BPA-free - Features: QuadVac™ insulation, leak-proof, dishwasher safe - Technology: QuadVac™ technology with 4 layers of protection Thank you for viewing. I am selling this because I don't use it. Although it is new and unused, the outer box is torn.