Borosilicate Drinking Glass

Remember - Instead of buying an empty glass you can buy Tea or Coffee inside one by purchasing our Piston Brand GROUNDD coffee or Astra's Teaity Brand Tea.

Made from lead free virgin materials, the glasses are hand blown with precision by artisans. Borosilicate is the same glass used in lab equipment, but we have increased the thickness to improve toughness. With dimensions critical to function we have added a level of quality control and a process of manufacturing new to the industry.

The glass volume has been calculated based on a medium 12oz coffee or tea. Sized for a 18-21g coffee shot (which is the industry standard). The dimensions of the piston and shaft have been precisely designed to minimize the amount of brewed liquid trapped on the dirty side of the piston, achieve 12oz of brewed gold but still allow the handle to mate keeping it free from obstructing drinking.

The diameter of the cup is familiar and very close to that of a beer or soda can. The added benefit of this familiar and common form factor means that the GROUNDD cup will fit in virtually every vehicle cup holder.

Rinse with water after use for cleaning we recommend handwash with soap and occasional dishwasher for deep clean. Be aware that the gold gilding can degrade in dishwasher.