USE AT HOME OR ON THE GO The Portable Glass coffee mugs can be used at home, in the office, at work or out and about. Perfect for your morning coffee or tea and can also be used for cold drinks too!ECO-FRIENDLY TRAVEL MUG - 12 ounce stylish and high quality glass, silicone and cork materials, are both food-grade safe and environmentally friendly. BPA-free and non-toxic.DISHWASHER & MICROWAVE SAFE - Convenient, easy to clean in your dishwasher and feel free to warm up your coffee in the microwave too (without the lid).NON SLIP CORK SLEEVE - The thermal cork sleeve provides grip and protection, whilst keeping your brew at the optimum drinking temperature.