Minute Maid Park entrance rules

I went to a game a couple weeks ago and got a soda in a souvenir cup. The lady said to bring it back to the next game I go to this season. I’m going to the Astros vs Angels game this Saturday. Does anyone know if I can actually walk in with that cup and get refills or will they stop me? If so, do I need to put it in a bag or not? Thanks!