R2D2, Luke Skywalker’s robotic sidekick, is a pop culture icon whose design elements continue to be referenced in a multiplicity of other products.
Among them is the customized Vespa scooter shown in these photos, from Incredible Things.
But one of the most far out variations is the R2D2 engagement ring from “My Answer’s Beep Boop!” at Geekologie.

Verisimilitude!
[Thanks to Janice Gelb for the links.]
It becomes a motor cycle? Was it a secret closeted Transformer?