Basic rolling deck set in a tray to avoid drops and spills ;-) 1 is the 1st 1 I designed and the walls of the tray are'nt very thick, is quite lightweight so to speak, tray sides are around 1mm ish (cant remember and have already edited the design file). Is still plenty usable, but it woun't survive in a back pocket if sat on.

Have beefed it up considerably on the thicker file, sides are 3.5mm thick, haven't printed it yet but will do soon. Also going to make a lid, which will be a mirror the tray but with an inner lip, will figure out attaching it and how....(possible options -click together, small magnets or even hinged)

I printed it in pla, but print it in whatever material you prefer.