Description These Ello Hammertime Stainless-Steel Travel Mugs are perfect for your morning commute. The BPA-free, leak-proof slider lid is designed for easy opening and carefree transport. Vacuum insulation keeps your beverages hot for five hours or cold for ten hours. The mugs fit easily into most car cup holders. Specifications Vacuum insulation keeps drinks hot up to five hours Mugs fit in most car cup holders All parts are top-rack dishwasher safe All parts are BPA- and BPS-free Do not freeze or microwave