Using your glass can is easy. Just fill it up with your favorite beverage through the opening in the bamboo lid. The glass straw is there for you to enjoy your drink comfortably. When it comes to cleaning, make sure to hand wash the cup, lid, and straw. Don't put them in the microwave or use a machine to wash them, as this can damage the product. The high - borosilicate glass can handle a wide range of temperatures, but avoid sudden extreme temperature changes. Keep the bamboo lid dry to maintain its quality. With proper care, your glass can set will last you a long time and continue to enhance your sipping experience.