A simple case for deleyCON mini jack (3.5mm) extension cable bought from Amazon (https://www.amazon.pl/dp/B09MQHGRGR). If you are not sure if it fits your cable, check out the dimensions on the photo in assembly guide. I'm also adding few variants of the case if you would like to print it for the corner mount with screws or glue. Fit's perfectly for IKEA's Alex+Lagkapten desk ;)

Bought this box on Amazon some time ago and recently the one of the clips has broken. I didn't wanted to throw the whole box away, so just printed it. I know it's quite niche use case, but maybe it will save some plastic boxes to be thrown away

Sometimes you just to have pause at reading but you don't want to lose focus on specific fragment. I loved to read when I was on-call duty and found it really helpful while had to put away and pick up my book quite often