First off, what in the fuck is wrong with you? who the fuck would see "pop can" and go "oh better use an empty one"... Get an unopened can you dumb bitch.
Next, do not use any glass bottles as is being suggested, if the glass is flawed or weakened it can shatter, if your muscles spasm it can shatter... you're pretty much fucked if it shatters your odds of bleeding to death before getting to a hospital are pretty high.
Fruits, vegetables, always fine worst that'll happen is a UTI or yeast infection. Can avoid that by using condoms on them. Lotion, shampoo, plastic soda bottles, etc are all great and you probably have quite a few laying around.
