Canister and Vial

Canister noun - A metal container in the shape of a cylinder.

Vial and canister are semantically related. in holder for physical object topic. In some cases you can use "Vial" instead a noun "Canister".

Vial noun - A small bottle that contains a drug (especially a sealed sterile container for injection by needle).

Canister and vial are semantically related. Sometimes you can use "Canister" instead a noun "Vial".