>>1590100>>1589977As expected I happened to come across something that might interest you.
I was cleaning my aquarium and I noticed I was all out of water test strips, but these test strips come in a small tin tube with a plastic lid, they are airtight because the test strips are influenced by the surrounding air and the tubes are a nice size too and lightweight.
Though I don't recommend buying them merely for this purpose, it's expensive.
