Zelco Mug 1 + Base The Earth's First Thermal, (Hot, Cold) No Spill, No Leak Mug! The Earth's First Thermal, (Hot, Cold) No Spill, No Leak Mug! Now you can enjoy your favorite hot or cold beverage at home or on the go with this advanced design spill-proof thermal mug. Double-walled construction provides a sealed airspace--so liquids will keep their hot or cold temperature. Resilient seals insure no leaks or spills if knocked over. Mug 1 has two curved openings to drink from that conform to the shape of the mouth. Whether left or right handed, it feels comfortable. The rubber base is toothed, to prevent slippage. Take Mug 1 when traveling, driving a car, to work, or keep it right at home. It's easy to clean and dishwasher safe, (in top tray) The ergonomic handle's rubber grip, and no-slide base makes this the number 1 choice of mugs. Resilient seals insure no leaks or spills if knocked over. Mug 1 has two curved openings to drink from that conform to the shape of the mouth. Whether left or right handed, it feels comfortable. The rubber base is toothed, to prevent slippage. Take Mug 1 when traveling, driving a car, to work, or keep it right at home. It's easy to clean and dishwasher safe, (in top tray) The ergonomic handle's rubber grip, and no-slide base makes this the number 1 choice of mugs. Mug 1 has two curved openings to drink from that conform to the shape of the mouth. Whether left or right handed, it feels comfortable. The rubber base is toothed, to prevent slippage. Take Mug 1 when traveling, driving a car, to work, or keep it right at home. It's easy to clean and dishwasher safe, (in top tray) The ergonomic handle's rubber grip, and no-slide base makes this the number 1 choice of mugs.