Just as the name would sugest softpacking would require...

For the last two summers I used two-gallon plastic flowerpots with the bottoms cut off. The thoroughly packed heaps of sand proved to be the key to this art, but getting the height I wanted with such small pails was time consuming. Carrying a thirteen-gallon garbage pail, like the professional, along with two small sons and all that goes on a trip to the beach, just wasn’t practical. I had to find a better way.

I looked and tinkered to create some kind of cylinder with comparable strength that I could roll up. My first model was made of a six-foot linoleum runner and some C-clamps. The result was more sand mass in less time, but linoleum is heavy to carry and the massive amount of water that leaked out the seam made for a lot more strenuous work. Necessity being the mother of invention, I developed a lightweight sheet of plastic that forms a cylinder by fastening attached Velcro strips. Unfastening the Velcro gives it the ability to roll up for portability. Today, whenever I’m on the beach enjoying the “mad” fun hobby of amateur sand sculpting and people ask, “how’d you do that?” I show them my Sandstackers™.

Now, you too can discover genuine fun - JOIN THE OBSESSION!

Information by:
http://www.sandcastlecentral.com/toolpages/sandstackers.html