Excellent! Kudos to PRESUMEDLOST and thanks for posting that.<br><br>Regarding the Teflon seals for the caps. The concentration of iodine of a few tablets diluted in a liter of water is far less than 25 or 50 tablets in a small vial acting upon a small area of material. There are not many common substances that are impervious to Iodine. Glass is one, Teflon is another. Many rubbers are apparently not. I cannot say some other seal material might not work, but for sure Teflon will work. I've seen the results of a leaking seal in a small kit (as in BTDT). It isn't pretty, the Iodine corrodes virtually everything. I'll stick with what I know works until something else is proven effective over the long term.