(1) You are so awesome (2) Suggest labelling them as "for guests" or something, because taking one can feel pretty clandestine.  Maybe add some toothbrushes or hairspray in a basket, so it's not just "HERE ARE SOME SANITARY NAPKINS FOR YOU."  (3) Suggest adding some tampons to this repository, as if one is not wearing underwear, pads are useless.  (4) Did I mention that you're awesome?