Polar Bear Tubes
Polar Bear tubes to keep your catch fresh
Polar Bear tubes are an amazingly simple solution to the problem of keeping your cooler cold without having to deal with ice. Polar Bear tubes are super easy to make and the cost is extraordinarily low for each tube. The original idea for the Polar Bear tubes comes from Bill Shelton.
PVC end cap fittings
You need some PVC pipe. We recommend a 2″ pipe but this can be adjusted based on the size of your cooler and your needs. A thicker tube will take longer to freeze, but it will also stay frozen longer. The only other materials are end cap fittings for the size PVC you elect to use, PVC primer and PVC cement. Make sure to use good quality PVC cement.
How to assemble your Polar Bear tubes:
Here are a few tips to keep in mind as you assemble your Polar Bear tubes:
Measure your freezer and your cooler. Make sure your Polar Bear tubes will fit in both your freezer and your cooler and think about which way you want to store them. Taking a minute to think about this will save you some headache down the road.
Keep it clean. If you keep the inside of your Polar Bear tube clean, you can use the water as an emergency source of clean water.
Let the glue dry. Glue one end fitting onto your PVC pipe and give it plenty of time to dry. When you are comfortable that it is dry, fill up the tube to about 90% with water and glue the other end fitting on.
DO NOT FILL THE TUBE ALL THE WAY FULL! 90% full of water is all you need. The empty space allows for the water to expand when it freezes. If you fill it full and then freeze, the tube it will burst.
After the second fitting has had time to dry, throw your new Polar Bear tubes in the freezer and get ready to take them into the outdoors.
Polar Bear tubes. Custom fitted for the lunch cooler box.
Polar Bear tubes in a full size cooler.