What's your method of doing this? Sticking a label on the bottle itself is no problem, but our daycare requires that all parts be labeled with initials as well. Since we use MAM and the Playtex Ventaire bottles, each has the separate base, rubber insert, nipple, and nipple ring. I have no idea how to label these small parts. Any thoughts?
Due 12/20/11 ~ Lost our Muskrat at 9w2d
4/25/12 ~ Our angel, Persephone James, is here!

Re: Labeling bottles for daycare
This. I love them! You probably only need to label the parts DC will take apart so for us we put the rubber band around the bottles and put the stickers on the plastic base the nipple goes in, the lid, and the solid lid I have on the bottle before it gets used. I wouldn't think you'd need to actually label the nipple. Like PP said- ask them for an example. I'm sure it won't be the first or last time they show someone.
By "each part" our daycare meant the bottle itself and the cap. Didn't have to label rings, nipples, etc.
I use stickers from Name Bubbles for all bottles, lids, and tupperware once DS started solids.
Stickers for big parts, sharpie for small parts.