Empire Glasswork’s bowl pieces are a testament to their lampwork mastery. The Beer Mug Bowl Piece features a single hole bowl, and a 14.5mm male joint. Features: Lampworked Borosilicate Glass Empire Glassworks Logo Sandblast 14.5mm Male Joint Beer Mug Design Dimensions: Height: 3.0" Width: 1.5" Depth: 1.25" Weight: 50 Grams Notes: Individually Handcrafted Art Piece. Limited Quantity and Availability.