Grenade MugCeramic 400 ml Hand wash only Get a head start to your explosive day with our Caliber Gourmet Grenade Coffee Mug. This mug packs a punch, offering a large volume of space for your precious morning coffee. It's ceramic construction is designed to keep your beverages hot or cold, and it's grenade like pattern makes it easy to grip! Daily life can feel like a battle, but you can be prepared with the Grenade Mug.