Gaylord boxes contain multiple layers of cardboard to provide sturdy support for any materials contained within. Gaylord boxes can be used to hold raw plastic resin, scrap pieces, regrind pellets, component parts, rags, and many other items. When used with a skid, these boxes can stack on top of one another for vertical storage. Often, a used gaylord box can provide just as much stability as a new gaylord box. Pay attention to the weight rating for each box to ensure that overstacking will not cause a safety hazard. Most used 3 wall and 4 wall boxes can safely hold 1000 - 1800 lbs, but it is always best to look at the weight rating for each box that you are loading.