I don't have experience, but I have worked with several of partners with severe allergies.. Like one partner was allergic to the ingredients in our refreshers (the smallest amount of contact and she would break out) and she got an accommodation to not make them!

I currently work with a partner that's allergic to bleach.. She has an accommodation not to use cleaning supplies other than sanitizer!

You could call PRSC. See if you can get an accommodation. Luckily it's only a temporary drink!