Safety and usage instructions and warranties: Read these instructions and warranties carefully and save them for future reference. Failure to follow the warnings below may result in personal injury or properety damage, or may cause your glassware to break or shatter immediately or later. Avoid sudden temperature changes to your glassware. To avoid risk of breakage due to a sudden temperature change to your Pyrex® glassware. Do not add liquid to hot glassware, place hot glassware on a wet or cool surface, or handle hot glassware with a wet towel, wet potholder or other wet cloth. Do not place hot glassware directly on a countertop or any metal surface, or in the sink. Allow hot glassware to cool on a cooling rack, dry potholder or dry cloth. Be sure to allow hot glassware to cool as provided above before washing, refrigeration or freezing. Oven must be preheated before inserting glassware. Do not insert glassware into oven for cooking or reheating until the oven has been preheated to the desired temperature. Snapware® Total Solution™ Pyrex® glass vessels are oven safe at 450 degrees F when used in accordance with safety and usage instructions. Do not use on or under a flame or other direct heat source, including on a stovetop, under a broiler, on a grill or in a toaster oven. Add liquid to the bottom of glassware when cooking certain foods. When preparing food that may release liquid, add a small amount of liquid sufficient to cover the bottom of the glassware prior to cooking. 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 the microwave; or overheat oil or butter in microwave (use minimum cooking time). Plastic lids should be removed for reheating purposes. Always loosen latches and remove lid. Be careful when handling broken glass. Broken glass pieces may be extremely sharp and difficult to locate. Do not use or repair any glassware that is broken, chipped, cracked or severely scratched. Do not drop or hit glassware against a hard object. Do not strike utensils against glassware. How to care for your Pyrex glassware: Pyrex glassware and Snapware® lids are dishwasher safe, and may also be washed by hand. When using dishwasher, load dishes to avoid bumping against other items during dishwashing cycle. Use non-abrasive cleansers. If scouring is necessary, use only plastic or nylon cleaning pads, again with non-abrasive cleansers. Snapware plastic lids: can be used in a microwave oven, refrigerator or freezer. Do not use in a conventional or convection oven. Do not use on or under a flame or other direct heat source, including on a stovetop, under a broiler, on a grill or in a toaster oven. In order to make use of the write on space on your lid please follow these instructions: to write on: use a soft tip non-toxic permanent marker or a soft tip wet erase marker. Writing should be contained to the "write here" area and marking on the textured areas should be avoided. You will not be able to remove the ink if it is on the texture area. To remove markings: wet erase marker-simply wash the lid by hand or in the dishwasher. Permanent marker - gently rub off using a soft dry dish cloth, paper towel or tissue. Other considerations: should the ink become hard to remove, you can use a few drops of isopropyl alcohol to remove writing.