>>I haven't been able to find another mini-Fox 40 (I gave my first one to my wife). Maybe I'll look for one of those flat USCG whistles.<<<br><br>I wasn't all that impressed with the mini-Fox 40 for it's size or price- it's an awkward shape, and takes a fair amount of breath, but it does seem indestructable.<br><br>Campmor ( www.campmor.com ) has the flat ACR whistles, the ones that say "MEETS USCG REQUIREMENTS". I think they were $3. I have a couple, and they're pretty good.<br><br>Barry Schuchart at Blue Line Outfitters has a number of different types. He just got some "toy" whistles that look like the ones that come in the sardine-can survival kits, two tone, sound like a "bobby" whistle- they're even flatter than the ACR, probably not as sturdy, but they're louder and require less breath, which could be important. I'm probably going to use one in my smallest kit to save space.<br><br>Also, I cut down one of the "featherweight" mirrors that REI and Campmor sell to credit-card size for my small kit. These are very thin, and flexy like a credit card. They have a sighting hole (no grid) in the center, and are normally 4 1/4" x 3 1/8". Saves a lot of space over a thick mirror, glass or acrylic.<br><br><br>