I like to use these tenkara line cards from DragonTail Tenkara to hold/store my level lines. They’re cheap, light, and take up very little space. They’re sold as holding a single level line (as shown in the pictures at the link above), but I use each one to hold two. I fold down every other one of the little plastic tabs on the card.
Here’s the result:


Works great!

Is that a regular slip loop attached to your level line or something different?
Thanks for this tip!
I’ve adopted it!
<