Lõõts (gender unknown)
air reservoir: flexible (usually of animal skin), ready for the insertion of stocks
Traditionally a seal’s stomach, but also a cow’s or dog’s stomach was used, or a pig’s or cow’s bladder; Nowadays [i.e. late 20th century; ws] mainly made of dogskin.
Leydi, Roberto: La zampogna in Europa. Como, 1979, p.115.