Check them out.
Make sure the joint is completely air tight or it may not work.
Glue a scrap piece of acrylic to the base of the tube, and when it sets, grind it down to make it look round.I got these acrylic rods and tubes from a local plastics company that gave them to me for free.And I found a cap at the hardware store that fit perfectly to hold.In the early 1800s, before the invention of the safety match, the "Fire Piston" was a common method of igniting fires.The handle of the piston has a cavity large enough to store some tinder, like this char cloth.If you hit the piston fast enough, you should get a compression ratio of about 25:1.You should see the tinder ignite, and then you can transfer it into your lil nl kortingscode tinder bundle and build it up into a flame.What you've done is create a claw that will hold your tinder.When the air compresses, the temperature raises to hundreds of degrees Celsius.And for only a buck.Haven't see the video yet?That's another item for my emergency kit, and a great way to see science in action.And with most fire pistons costing over.00, I'm proud that mine does all that and more.To test it out, add a bit of lubricating jelly like Vaseline to the O-ring, and then some char cloth to the tinder claw, insert the rod gently into the chamber and give it a quick and concentrated whack.They were scraps ready to be thrown out, and perhaps you can find a similar company in your area that will do the same.Use some of the tubing to reinforce the joint, and add another rubber O-ring to finish the piston.You can still see it here!

This is mainly for aesthetics.