pouch

nouns

a small or medium size container for holding or carrying things
is a type of (narrower)
a flexible container with a single opening
"he stuffed his laundry into a large bag"
an enclosed space
"the trapped miners found a pocket of air"
(anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)

verbs

put into a small bag
is a type of (narrower)
put into a bag
"The supermarket clerk bagged the groceries"
send by special mail that goes through diplomatic channels
is a type of (narrower)
send via the postal service
"I'll mail you the check tomorrow"
swell or protrude outwards
"His stomach bulged after the huge meal"