Handle and base are made of Black Walnut. The inside liner is a two-part food safe epoxy and comes with a lifetime guarantee for normal use.
Capacity: 19 ounces
The lining cannot withstand boiling water, but hot and cold beverages are okay, including hot coffee. Wood makes a great insulator; so its a good choice for wine, soda, or beer.
Now for the logic part: Do not use in the dishwasher or the microwave!
Hand wash with warm soap and water.