<a href=showthread.php?s=&postid=6535623#post6535623 target=_blank>Originally posted</a> by Surfzup2k4
And when it's sitting in the car, what is sitting there with the weight of all that sand on it unsupported? Oh yes, THE GLASS BOTTOM. The pillow acts to take the weight away and dampen the bouncing. With the pillow in place, it's just like the sand is sitting on the pillow with glass in between them. Do whatever you want, just goodluck with it.