As I indicated before: one can stick the original canisters in line with adhesive tape forming a casing just as that premade casing.
Though with sealing caps!
AgX: I noticed. But that thing won't work in this humid weather. Beside I'm quite clumsy. I now use a small traveler's bag (from Turkish Airlines) with 3-4 rolls packed together in small ziplock bags. I can shove in at least 16 rolls easily - kinda nice.
Bhai Saab: I use those type of boxes (air tight version) for exposed and bulk rolls.
Lay a number of canisters in line on a table. In Zig-Zag manner, bottom-up, bottom-down. By this you can use canisters with protruding rim of cap.
Put adhesive tape on one side, turn the line around, tape the other side.
Then tape it all around.
A linear "case" should have been formed.