The mug is made from high-quality materials and is dishwasher and microwave safe, so you can enjoy your beverage worry-free. It's also made in the USA, so you can support American craftsmanship. Dishwasher Safe: Keep your treasure chest (and your mug) clean with ease. Our mugs are designed to handle the dishwasher's rigors, so you can get back to your swashbuckling adventures. Microwave Safe: Warm up your favorite brew without a worry. These mugs can handle the heat, ensuring your coffee or tea