flask 
(flăsk)
(flăsk)n.
1. A small container, such as a bottle, having a narrow neck and usually a cap, especially:
a. A flat, relatively thin container for liquor.
b. A container or case for carrying gunpowder or shot.
c. A vial or round long-necked vessel for laboratory use.
2. A frame for holding a sand mold in a foundry.
[Middle English, cask, keg, from Old French flasque, from Late Latin flascō, of Germanic origin.]