Double wall ceramic tumbler is a great way to start the day with your favorite coffee or tea. This mug is an excellent way to start or end your day. Even on the coldest of workdays, this 12 oz mug is sure to brighten everyone's morning. It fits in any standard cup holder with a 2.5" diameter bottom. You may use it at your desk,at home, or on the go! This product contains no BPA, phthalates, lead, or toxins. These are made of FDA-approved food-grade ceramic and meet California Proposition 65 requirements.