This is sort of like a mini Tripp-Trapp. The HandySitt is a tray-less booster to put on a chair, which can be a lot more useful than a high chair sometimes. It folds up, although honestly I never want to carry anything when I travel.
It's also great-looking, though a chunk of change. Comes with an add-on so it can be used on the floor, although it inevitably would be used as a stepstool too and I'm not sure how stable it is.
I think it's one of those things you might love, you might not use -- depends on your kid-feeding lifestyle. But at least people are making things that look nice, right?
Saw it at NOTCOT.