ma3t Pinch Hold Mug is a climbing mug that helps you train during your coffee break. Thanks to its historic pinch grip, your break has never been so challenging! It's also a beautiful gift idea for your climbing friend, give it some thought! ma3t climbing mugs. These crazy English folks from Trent produce mugs with pinch grips to stay in shape even during coffee. ma3t Pinch Hold Mug Bone climbing mug