Accurately monitor temperatures in freezers, refrigerators, incubators, ovens, and other environments where stability is required. All Thermometers are filled with Enviro-Safe liquid and supplied with a unbreakable plastic bottle filled with Enviro-Safe liquid or glass beads. The thermometer can be removed from the bottle for recalibration if needed. Thermometers are PFA coated for enhanced safety in case of breakage. Use the magnetic or hook-and-loop attachment strip to securely attach the bottle to object such as a metal wall or door. All Enviro-Safe™ glass thermometers contain an environmentally friendly non-mercury liquid that is 100% certified as non-toxic, non-hazardous, and fully biodegradable. In case of breakage the liquid can be cleaned up easily with soap and water. Each thermometer features a green liquid and white back glass. These thermometers also feature recyclable packaging, RoHS compliant, individual serial numbered and have a statement of accuracy.