Canteen and Demijohn

Canteen noun - Sells food and personal items to personnel at an institution or school or camp etc..

Demijohn and canteen are semantically related In some cases you can use "Demijohn" instead a noun "Canteen".

Demijohn noun - Large bottle with a short narrow neck; often has small handles at neck and is enclosed in wickerwork.

Canteen and demijohn are semantically related in small container for liquid topic. You can use "Canteen" instead a noun "Demijohn".