Promotional VINGA Nagano RCS to-go mug 350 ML This to-go mug is the perfect choice for those who want both style and functionality on the go. Sip through the convenient flip lid or simply remove the lid and use it as a regular mug. The wide opening makes it easy to clean afterwards. The double-walled vacuum insulation keeps your drink cold for up to 12 hours or hot for up to 4 hours. Not dishwasher or microwave safe, hand wash only. Certified by RCS (Recycled Claim Standard), RCS certification guarantees that the entire supply chain of recycled materials is certified. The total recycled content is based on the overall product weight. This product contains 30% RCS certified recycled stainless steel.