Hot Cups?

I have a stupid question. I went to Party City to get really pretty christening napkins and desert plates for cake time for the christening. Dinner we will just use the chinet. Anyway, I didn't get the hot cups with the design becuase they were so expensive. I will spend $50 for cups, cake plates and napkins, which i think is ridiculous. However, I don't want it to look bad that I got the design in the napkins and desert plates and then they are drinking out of a regular white syrofoam cup... Does it matter?? Or should I just splurge and get everything in the same design??

Thanks,
denise