These folding cups are an interesting one. They were originally launched as Orikaso a few years back, they included some plastic poppers in the design. Worked well and were a good option for the UL crowd. Then Orikaso went bust, my understanding is they tried to market them as an item that you would get your company name emblazoned on, to give away at trade shows and the like. They then reappeared a couple of years later under a different name (can't remember it now). With a changed design, they had removed the poppers that were on the original, and had embraced an origami style folds and tabs only approach. They didn't work as well as the originals, and went bust again...
They have recently reappeared under the brand "fozzils" and seem to have taken the original design with the poppers, and are trying again.
I have both of the first two evolutions. In various configs. They are a nice idea, but I am thinking of getting a sea to summit X plate instead. For a cup, I have the folding kuksa in both sizes that Mary linked to earlier. Works better, tho is marginally heavier.
Thus concludes a short history of plastic folding thingies... I think I may need to get out more...
Julia