You can never be to safe when it comes to your horns honking abilities. Keep a bottle of the mechanic dudes horn oil handy for that situation when the horn starts acting up. Feel free to fill this empty gag can up with any substance you would like. This gag gift is re-usable over and over again. Have you horn honking better than ever with this hilarious gag gift. Makes a great alternative to blinker fluid and headlight fluid. Pick up a tin of the mechanic dudes horn oil for your next gift exchange.