It might seem like the soprano ukulele is already an exceptionally portable instrument, but Kala have taken that idea one step further. They have made it even more compact by shrinking the width of the body (to an inch and a half at the widest).
The uke has a solid spruce top making it very much a serious ukulele (not just a gimmick).
There's also the humorous (or tacky depending on your point of view) compass on the headstock.
Ken Middleton plays and reviews his soprano ukulele.
On eBay UK
BornAgainJeeper on his soprano Travel Uke.
Construction: Solid Spruce top, Mahogany (laminated) back and sides
Tuners: Chrome die-cast sealed geared tuners