A little company I worked for ~20 years ago (Michigan, U.S.A.) had a female UPS driver. Her route was ~99% residential - so extremely few bathrooms. (Vs. it was easy, then, for UPS drivers delivering to office buildings, restaurants, etc.) We made it clear that she was free to use our bathroom at any time. She made it clear that our package delivery time & pick-up time could be far, far better than "that's where you are on my route" when we needed them to be.

(And I'm sure more things got shipped UPS than should have...I guess you'd call that "UPS's cut" of the deal.)