Borosilicate Glass Mug Made of premium quality lead-free borosilicate glass, allowing you to heat up your beverage to a desired temperature in the microwave, or conveniently clean it in the dishwasher. Perfect Design For Kitchen This glass tea cup can be used for warm or gold tea, coffee, milk, juice, soda water and vegetable juice or some other daily uses. Crystal Clear Glass Cups for Tea & Coffee Beautiful addition to any cafe, restaurant, pub and definitely to your own home. Whether to yourself or for a loved one.