When you remove a sticker from something, how do you remove the sticky residue? ...
Answers: You can try several things;
GooGone is awesome, but if you don't have any, try for a moment mineral oil, rubbing alcohol, or (if it's on a cup bottle) soaking it in soapy river then rubbing away the rubbery sign.
Goo Gone is perfect for removing sticker residue. You can find it at most grocery stores.