|My twins are 17 months and I just sold all my cotton L Sandy's to replace them with bamboo (one of my boys has sensory issues and I love his mood change since diapers not longer hurt him!). I doubt my twins will be potty trained before three, so I figure we still have lots of use with them! Of course, this thinking takes out the scenario of my preemies not fitting them all the way to potty training, but I am ignoring that for now.
I do suppose that the one benefit to having twins with severe developmental delays is that they have not learned to take off their diapers. In May Timothy quickly learned to remove a disposable while in the hospital (it was a long four days since he didn't have clothes!), but they can't remove their clothes or diapers. Although, I must say Timothy does try to pull his diaper down a bit--the other night I got the boys out of the tub and slapped diapers on them. I wasn't sure who was who and looked at the boy in the hall. I didn't even have to examine the face once I saw the diaper around his hips, his penis sticking out the top, and him dancing!