I think the Labeled Bambu Lab Swatch Display is the best way to store the Bambu Lab filament swatches (wish it was my idea).
This is just a lid for the box to be sure that the swatches stay in place.
Printable in 1, 2 or 3 colors. No support needed.
I needed several tries to find the right tolerance of .5mm, so that the lid snaps in place but also is removable. If you have snug fit problems just scale x and y up to 101%.
Important Note:
I only used the Bambu Lab logo to show that the filament swatches inside the box are an original Bambu Lab product.
This does not imply official endorsement of Bambu Lab! It's not a product of Bambu Lab!