Here is a handy tool that saves your back preparing for deadlifts and CrossFit training. The LIFT-EZ Portable Barbell Jack Wedge lets you easily add plates faster and more conveniently. It has a compact design, so you can easily fit it in your bag. It has a wide base to handle 100lb plates.
The LIFT-EZ wedge is sold in a variety of colors. According to the company, these are tested with 800lbs.