u/Stresso_Espresso

I want to make a Swiss Army knife for crocheting on the go- it would have a bunch of useful items on it. My current ideas are:

1. crochet hooks of three common sizes

2. scissors

3. tapestry needle which can be slotted in and removed as needed

4. stitch marker container

5. mechanical stitch counter (similar to a 4 digit lock)

Any ideas for other useful things you would need for crocheting on the go?

Also does anyone have any idea how someone would go about actually making a prototype of something like this?