- The day’s first sip of caffeinated goodness tastes even better when you’re drinking out of a hefty, handcrafted cup. Like our tankards, our wooden coffee cup is made in-house, with a built-in bottle opener at the base. Our craftsmen use Black Walnut, straight from the tree, to form the unique mug and handle shape. Once the mug has been sanded, it’s sealed with a food-safe epoxy to safeguard against leaks—so you can be sure you’ll enjoy every last sip of your morning deliciousness. We understand that over time, your coffee cup may experience a little wear and tear or accidental falls to the ground. Have no fear! We offer a Lifetime Guarantee (see details below) to keep it looking as good as new.