Readings & Meanings:
a can (drink or food can)
Canned mackerel is my favorite.
Please put the empty containers in the recycling bin.
I cut my hand with the can opener.
缶 is its own radical! (But all the kanji that use it as a radical are too rare to be on the 1,945 list of common kanji.) Its radical name is Hotogi.
It's a picture of a clay pot that bulges in the middle.