ThermoDrop® Zipper-Pull Thermometer

Simple and reliable

I use this thermometer clipped to my swim buoy for open water ocean swims. Not an advertised use but it has worked perfectly for anyone looking for same use. As far as durability only time will tell how prolonged use in salt water effects it. For the cost so far so good.

It's great!

I bought 2 and have compared them to other thermometers and each other, inside, outside and inside refrigerator. They seem to work really well and I like the portability, one is on my keychain.