This puppy really works a great deal better than plain ol' gel packs. It works better because it actually starts to melt around 71 degrees in contrast to regular water-based gels, which start to melt around 33 degrees Fahrenheit. I use these each and every time I ship my precious frogs---because they're worth it (and so is a live delivery!)

Work like a charm. I've shipped Terribilis, which as quite heat sensitive to Arizona where it was 95 degrees during the day. They arrived just fine and the temp inside the box was 73 degrees. I use these to ship any frogs in any temperatures, they help me feel better knowing that temps will be just right no matter what kind of conditions I'm shipping in.

I don't ship without these things. As the description states, the internal box temps upon arrival are always the listed 68-75 degree mark unless there's an extreme unexpected weather change overnight. They're pretty expensive, but definitely do their job.

These work very well! They do everything they say they do. I spent the extra few dollars on the ridged version vs the packets because I'm scared of puncturing them