DH and I used to take along inflatable U pillows on long flights, easy to deflate & slip back into backpack, until one of them leaked for a 13 hour flight to HNL. Then, we got the soft U's with the beads for trips except that they aren't easy to stuff into the pack.

Just found the neck roll pillow (regular straight round-tube style) with the beads at our local Target stores while shopping for refill items for the stupid 3-1-1 ZL bag @ $2.50 each, grab 2 of them. Inexpensive and much smaller than the U-shape & they are coming along for our Asia trip in about 10 days on CX flight.

Just fitted 2 of them together into the small travel pillow case, perfect - together, it will work well as a lumbar support (or even to sit on top of it) or alone for some neck/head support since we haven't been on the new CX Y cabin shells, heard about its lousy back/neck lack of support - so will give these el cheapo a workout.

Going to take 2 extra travel pillow cases along as we prefer to combine 2 plane pillows together as 1 to create firmer support for what not, and with a small safety pin to keep them from sliding around. Sweat Dreams .... the best we could.