My friend Erin & I started a teacup collection a few years back. Every year for a birthday and/or Christmas we give each other one unique teacup, new or antique. Our mothers have also joined in giving us antique teacups from their own collections. Plus, today my mother-in-law gave me 4 gorgeous hand painted teacups that belonged to John's great grandmother.
Believe me, I'm fully aware that I need to have a baby first to actually pass something down to them, also teacups will probably be pretty lame in 2033 but hey, here's to wishful thinking.
[Extra points if you automatically read this post header with a British accent]