We have a 4 qt.model SCCPVP400-B. This is a great crock pot and a good size for just 2 people. We have had this one for about two years. The other night we heard a soft boom and went to the kitchen to find the handle to the lid had been blown off of the lid. The glass was shattered and our roast which was done and smelled good was covered with glass. We use liners and can not figure out what caused the lid to blow up.