Using this tumbler is easy. Just remove the lid, fill it with your favorite iced coffee or other drinks, put the lid back on and insert the straw. You can customize the removable insert to add a personal touch. When it comes to maintenance, simply wash it with mild soap and warm water. Do not use abrasive cleaners as they might damage the tumbler. And always remember, never put this tumbler in the microwave as it can cause damage to the product.