I have read a of a few people having trouble finding the altoids gum container that fits the project so well. I did too. Looked in a bunch of shops all over Ventura and San Diego California as well as a bunch in the Philadelphia area with no luck.
I started looking around for alternatives but only found one possibly suitable and that was after I had finished making a container. The Wii gum container looks like it is the appropriate width though it has a significant amount of length that may need filling.
What I decided to go with was leather. I had a bunch laying about and decided to see what I could do. It turned out pretty good for a first rough run. I think I will make another with a good stain and better stitching but this has worked like a charm thus far.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.