See what you can avoid

Avoid moldy shuttlecocks. Foam roundels from SAVE-BIRDIE are antimicrobial, but in the long term, it would be a good idea to add a little Rodalon or Atamon in the water. If you use Chlorine, a few drops will be enough.

Water and cardboard are not a good match – avoid it!
Just make sure you get your hands on a SAVE-BIRDIE humidity tube instead – it lasts a life time.
And in addition, you can always see how many shuttlecocks you have left in the tube.