Maišas (m)
air reservoir: flexible (usually of animal skin), ready for the insertion of stocks
Made of sheep-, calf-, goat-, or dogskin, or from a sheep’s stomach.
Baltrėnienė, Marija & Apanavičius, Romualdas: Lietuvių liaudies muzikos instrumentai [Lithuanian folk musical instruments]. Vilnius, 1991, p.163.