a 3d printed case for the sprig you can print yourself!
You have 2 different versions of the sprig case, one being being the orginal case that takes less filament and is more lightweight. The other one is made by Ben park. This version of the case is alot more like a handheld video game console and uses a bit more filament. Ultimatly it comes down to what you like the look of more. 
The first version of the case has been tested on PLA, PETG, and TPU The second version has been tested on PLA and PETG
In most use cases you will want to head to makerworld and directly print it here with all presets already chosen but you can also download the 3mf files and download from that. Supports should be enabled.
Once everything has finished printing you can use pliers to remove the support material but it is not needed to, inser your sprig in the case and attach the top cover.
Your sprig case should be ready to work!