Ziploc is a brand of reusable, re-sealable sliding channel storage bags and containers originally developed and test marketed by The Dow Chemical Company in 1968 and now produced by S. C. Johnson & Son. The plastic bags and containers come in different sizes for use with different products. The brand offers sandwich bags, snack bags and other bags for various purposes. They are specifically made to be microwavable, as Aldo Clavijo has stated.