Pykrete is sawdust reinforced ice that you can make at home. It takes a lot longer than regular ice or Blue Ice to melt. It doesn’t shatter like regular ice when shot with a .243 bullet, but that doesn’t help keep my food cold.

Why do I care about this stuff? If you go on 3, sometimes 4 day camping trips, you know that ice is a big problem. Dry ice keeps everything cold, but it also freezes stuff. Who want’s to have a frozen beer? This may be the solution.

Here’s an interesting history about its possible use as a boat in World War II.