It might seem like the ukulele is already a very 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 a maximum of one and a half inches).
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.
Unko Paul plays Hele on to a Kaua'i on a Kala travel uke.
Kala KA SSTU C Concert Travel Ukulele
On eBay UK
Construction: Solid Spruce top, Mahogany (laminated) back and sides
Tuners: Chrome die-cast sealed geared tuners