These Cambro 23SLB6250 printed StoreSafe food rotation labels dissolve completely off of any container in less than 30 seconds through the dishwasher or under hot or cold running water. Use them to clearly label and date prepared contents in food pans and storage containers, while maintaining a First In, First Out (FIFO) food storage and handling system. When in use, these labels are capable of withstanding temperatures of up to 200 degrees Fahrenheit for 4 hours and temperatures as low as -40 degrees Fahrenheit in the freezer! These StoreSafe food rotation labels are safe for all sewer and septic systems, resulting in zero buildup in drains after use.