Not only is it important that the contents which are being stored are accurately and legibly labeled, just as important are the types of labels being used. Using masking tape to label food storage containers may leave behind a sticky residue that can harbor bacteria, come into contact and contaminate food. The safest way to label food storage containers is to use Cambro"s 1252SLB250 Dissolvable Label Rolls. These labels are biodegradable and will dissolve in under 30 seconds, making it easy to remove and leaving no sticky residue. Labels help maintain First In, First Out (FIFO) food storage and handling system and reduces potential risk of food borne illness and cross-contamination. Safe for all sewer and septic systems and no build up in drains. Withstands temperatures up to 200°F (93°C) for 4 hours and are microwave safe. Labels measure at 1.25 inches long by 2 inches wide, comes in a box of 250.