Try a vending machine. ( Ok, I work for a large vending company, Canteen Services, so my opinion may be unfair.)
Do you have vending machines in your shop? If so, talk to your routeperson about getting you healthier items. They are available 'cause we have really increased the amount we offer.
If not, try a Wendy's salad.
BTW-I positively hate McDonald's. I know they have gotten better over the years but I just can't handle the "greasy" feeling after eating them. Blech!!