Failure to follow the warnings below may result in personal injury or property damage, or may cause your glassware to break or shatter immediately or later. Avoid sudden temperature changes to glassware. Do Not: add liquid to hot glassware; play hot glassware on a wet or cool surface; or handle hot glassware with wet cloth. Allow hot glassware to cool on a cooling rack, pot holder or dry cloth. Allow hot glassware to cool before washing, refrigerating or freezing: Preheat oven before inserting glassware. Do not use on or under a lame or other direct heat source, including on a stovetop, under a broiler, on a grill or in a toaster oven. Add a small amount of liquid sufficient to cover the bottom of the dish prior to cooking foods that may release liquid. Avoid handling hot glassware without dry potholders. Do not use glassware to microwave popcorn or foods wrapped in heat-concentrating material (such as special browning wrappers), heat empty or nearly empty glassware in microwave or overheat oil or butter in microwave. Do not drop or hit glassware against a hard object or strike utensils against it.