Sometimes you overlook things that are right in front of your face! One of my hobbies is keeping tropical fish. I frequently ship and receive small fish via the mail. The fish are shipped in plastic bags. One of the bag sizes we use is approx 2.25” x 8”. The manufactures offer the bags in different thicknesses. One of these folded up may fit nicely in the PSK and be a short-term alternative to condoms. We seal the bags by spinning the tops and either tying a knot or by doubling over the twisted end and wrap a small rubberband around several times.<br><br>But there’s more! Just this week I received a box where the shipper used a relatively new product called Breathable Bags from Kordon. They are gas permiable, which helps the fish by allowing the CO2 to escape and the oxygen to enter the water. I don’t know if that matters or not with purification tablets. Buit what caught my attention was how elastic they were. The shipped tied them in a tight knot that I could not untie, so I decided to puncture the bag using my index finger, which I can easily do with the traditional poly bags. But I could not do it with these as easily. I’m sure I could have applied much more preasure and puncture the bag, but I didn’t want to harm the fish <s>. So I ended up using a knife to slice the top off. The point is that these bags are far more durable than regular poly bags and my hold up rather well in the PSK tin as well as during actual use in the field.<br><br>Unfortunately, they are not sold through retail. The few folks I know that use them ship enough to justify buying case lots from industry contacts they know. I could get a couple of samples for testing if folks are interested. Anyone planning on being out in the field soon?<br><br>>>>P.S.- for decades, when backpacking, I’ve carried a 6-8 foot length of aquarium tubing, the smallest diameter I can get, … I can set up a siphon, and the canteens fill without work or attention <<<<br><br>Nice tip!<br><br><br>Willie Vannerson<br>McHenry, IL