Blocking 
Next, the honey-like material is blocked, or centered and cooled, using a cherry wood tool kept wet in a pail of water. The process keeps the glass from becoming too “wobbly.”  Photo 9 of 17 in Inside Master Glassmaker Simon Pearce’s Sustainable Factory in Vermont

Inside Master Glassmaker Simon Pearce’s Sustainable Factory in Vermont

9 of 17

2. Blocking: Next, the honey-like material is blocked, or centered and cooled, using a cherry wood tool kept wet in a pail of water. The process keeps the glass from becoming too "wobbly."