Mahi enterprise Presents Perfect For Hot Or Cold Drinks: Tea, Coffee, Latte, Espresso, Cappuccino, Macchito, Demitasse, Smoothed And Juice! Double Wall Glass Made From Heat and Condensation-Resistant, Scratch Free Borosilicate, Keeps Your Liquid Stay Hot Longer! Dishwasher Safe, Microwave Safe, Oven Safe, and Freezer Safe! Set Of 6 Double Wall Glass Coffee Mugs! CLEANING SKILLS Dissolve the commonly used soda powder in an appropriate amount of water, soak the utensils for 30 minutes, gently scrub with a soft brush, and finally rinse with water. After the white vinegar is diluted, soak the tableware for 30 minutes, gently scrub with a soft brush, and finally rinse with water. Apply toothpaste directly on the surface of the utensil, soak the utensil for 30 minutes, gently scrub with a soft brush, and finally rinse with clean water.