why are wooden barrels convex instead of cylindrical (like steel drums)?

Question

why are wooden barrels convex instead of cylindrical (like steel drums)?

In: 24

Answer 1

Answered in this sub previously:

ELI5 why are wooden barrels “barrel-shaped” (i.e., wider across the middle than at the top and bottom) rather than cylindrical? Wouldn’t cylindrical containers be easier to build, store, and transport?
byu/big_macaroons inexplainlikeimfive