The Pop Up Disposable Cooking Thermometer, also known as the Pop Up Timer, is the most accurate temperature indicator of its type in the world. Using patented organic firing mediums, the Pop Up accurately indicates (within + or – 2 degrees F) when poultry, meat, and fish items have reached their optimum level of doneness, thus eliminating the guesswork and assuring a perfectly cooked product each and every time. We have a Pop Up to fit just about any type of food item, with products ranging in temperature from 138 degrees F to 180 degrees F. This is the same Pop Up timer that is trusted by the companies that package your roasting chickens and turkeys. You can also find them in use by your local grocery chain meat markets in their pork and beef roasts. Store in a cool, dry place below 86 degrees F (30 degrees C). Do not expose to direct flame.