Well, I've been trying to find uses for the leftover kydex from holster making. So I came up with a floatant holder. The bottom offers enough retention to firmly hold the floatant. The top is accessible to squeeze out the floatant. And it comes with a paracord loop and finished eyelet. $7 shipped to your door. FWIW, kydex is a very durable plastic that is heat molded. This is not like the flimsy rubber ones. PM me if you're interested and we will work out the details.
If you need any kydex work, I may be able to help there too.

