The meaning of this character is related to permissions or ability to do something, not an actual "can" good.
Mnemonic
[k-] Kermit the Frog is in the [3] basement of the [-e] electricity plant. In the corner is a dusty aluminum trash 可 can that says: "DON'T OPEN". Nobody 可 can tell Kermit what he 可 can or can't do! He goes and touches the 可 can, which is electrified, and is burnt to a crisp, his ashes falling onto the cement basement floor.