I've got one of those, wot, certainly something that does the same job, had it a few years so maybe different. Blue with bits that fold over each other. My nearest and dearest laughed, how rude! I love it. Great for taming falling heaps and also for packing a suitcase. Can't be doing with the new fangled rolling approach, doesn't work for me! I"ll let you describe them properly to soop*, not sure I can manage a coherent description. One of those things that needs suspension of disbelief.
. Would very much welcome some of whatever wobbly is taking, preferably before I got very bad tempered moving furniture. Bits of me are hurting I didn't know I had. Never mind, it means progress and soon sanity will return.