Revealed June 2017. Released August 2017.
From a retailer, Entertainment Earth:
The galaxy's most famous bounty hunter appears to have lost his head! Enjoy some Bantha Milk from the head of the leading Mandalorian in the Star War universe. This Star Wars Boba Fett Proto Pop! Home 12 oz. Mug can hold up to 12 ounces of liquid. Hand wash only. Not dishwasher safe. Do not microwave. Measures approximately 3-inches tall. Ages 3 and up.