Know someone who is into heavy petting? Who can't pass a four legged fur baby without stopping? Created from porcelain clay and lead free glazes. Measures 6.5 x 3.5  inches and holds 18 oz. Lid is BPA free and has an open/close feature. Microwave and dishwasher safe. This item is slip cast- which is a more efficient way of making pottery. HOWEVER: because each item is individually handcrafted the fit of lid to mug can be imprecise. I will make every effort to get as tight of a seal between the mug and lid as possible- but none of the travel mugs I make are so tight that they can be turned upside down.