How to simulate a fake vagina?

This is for masturbation purposes and i dont' want to buy a fleshlight or whatever its called..is there any homemade ways to simulate a vagina or maybe something i can stick my penis into and **** really hard and it will feel really good i don't mind spending some money if its cheap and i can get it at a local store somewhere. I know this will sound stupid to some people but im completely serious and would like some serious answers.