What are some food/drinks that can mess up your singing voice?

milk

In over fifty years of singing professionally, I have never found any food or drink that messed up my singing voice. Milk causes the production of mucous, which can cause some people problems with singing, but I didn't find it to be a problem. But then, I never drank milk except while eating, and I never ate immediately before a show. Filling the stomach with food can make the voice sluggish, if you're a singer who uses your diaphragm muscles, as you should.
Orange juice was never a problem for me, though I know it can irritate the vocal cords sometimes. I always kept a coke or other soft drink handy to keep my throat wet. Worrying about whether something is going to mess up your voice is probably the biggest problem.

dairy and citrus

milk, orange juice, asprin, and any thing dairy, it will mess woith your voice and dairy will make you feel sick under the lights during a concert

Menthol (chewing gum, anything minty, etc...) will reduce your ability to vocalize. I looked all over the internet to find a verified explanation and couldn't find one, so to the best of my knowledge menthol (as with any alcohol compound) in vapor form will change the properties of the air in your lungs, and thus, will change the way your vocal chords make sound. I'm not sure if this is due to the fact that your brain is used to producing sounds under normal conditions and is unable to do so correctly given the difference, or if the reaction is of a more physiological nature. Either way, just remember that if you are congested or have a sore throat before a performance, DO NOT TAKE A COUGH DROP! Prepare in advance and take an over the counter cold medicine that doesn't contain menthol.
Hope that helps.

Milk, alcohol or anything really hot or too cold.

dairy, aspirin products are bad too. tylenol is ok. alcohol and caffeine. chocolate and fatty foods and spicy foods. these are the things my voice teacher tells me to avoid. especially before a lesson.

orange juice

Chocolate before and cold things after...

The rest of my band looked at me like I was crazy for having a strawberry milkshake in the middle of cutting a record. Hey, I didn't know! But I did pay for it later. And I still cringe when I hear a couple of those songs.

Dairy foods...cause extra phlegm
Pineapple or anything really sweet..never before going on! (like an hour before!)