Propane Gas Tank

So yeah its a propane tank, I made the measurements pretty small so if u want to print this you need to resize it in your slicer. For me putting 50mm in the Z-axis came out good. I was thinking to make this a keychain too, so if anyone has ideas how to make it a keychain lmk please, very appreciated. I am new to CAD, so any feedback is super duper appreciated too.