If your child is in a daycare and the teacher asks you to bring something in for your child....do it!!! If your child's teacher asks you to bring in diapers, wipes, a change of clothes, a blanket, a cup or anything else that your child uses daily, BRING IT IN!!! There's no reason that a parent shouldn't be providing these things for their kid. To me, when I ask you for these things and you can't be bothered to bring the stuff in, it tells me that you don't really care that much about your own kid, and that's sad.
Oh, and don't bitch about us asking you for a pack of diapers a week after you've brought some in if you're only bringing in a pack of 30. At the daycare center I work in, we have to change every child AT LEAST every two hours (obviously more if they have a BM). If your child is there 10 hours a day (which most are), that's 25 diapers a week, not including BMs. That means that your child is out of diapers. It also means that, if you don't bring more diapers in, I'll have to use someone else's diapers for your child, which isn't fair to the other parent, who is ACTUALLY responsible and brings in the stuff that their child needs.
Obviously, I work in a daycare center. This is one of my BIGGEST pet peeves! Bring supplies for your child, you lazy POS!!!!
Just to clarify: forgetting stuff once in a while is COMPLETELY understandable. I get that. I forget stuff, too. What isn't ok is not bringing things in EVERY TIME I ASK. Literally every time the child needs something, I have to ask a specific parent MULTIPLE times to bring it. In the meantime, the child has run out of diapers/wipes/whatever and I don't have extras.