Adorable children's apron with genius elasticized neck strap from Beth Galvin at Craftsy. Years ago, I saw this child's apron with elastic in the neck, and I've been using it for adult aprons as well ever since. No sliding D-rings, no messy ties -- brilliant.
I can't think of many items that can be currently purchased that have heirloom potential and that aren't wildly expensive. Each of these recipe boxes is hand-carved from local hardwood and takes three months to finish. Wowza! Probably the best wedding gift I've seen ever, too.