How to run comfortably without a sports bra for recreational activities?

I don't know if this is possible, but I'd really like to be able to play a spontaneous game of 3 flys up or ultimate frizbee or tag without worrying about pulling my shirt down. The bounce factor is a bummer. I'm a full C cup so its not as bad as it could be but is there anything I can do about it? Like is there a really good not incredibly expensive comfortable bra or undergarment I can factor into everyday apparel so I can run around whenever I want without gripping my shirt to stop the bounce/minimize it?