I've never used another kids' wipes for someone else either. They each have their own and I tell parents when I am running low. Some kids poop way more than others and use way more wipes...it wouldn't be fair for another parent to be supplying them. The only exception is for outings where I have one bag of wipes rather than carting 5 with me...I just take a little from each kid's supply, but I take more from those who frequently poop at the park (actually I only have one who does that normally).