small bag; pouch
Refers to a small bag or pouch, often for carrying personal items or as a container for small objects.
小袋に小銭を入れて持ち歩いている。
I carry small change in a small pouch.
Compound of 小 (ko, 'small') and 袋 (fukuro, 'bag'). The reading こぶくろ is a straightforward combination.