Duo-Dots are the first labels of their kind to indicate both first day and last day of use for products all on one label using dual color-coded designations, the vendor claims. They eliminate the need for wall charts and other reminders and do the food rotation math for you, taking the guesswork out of food rotation.The labels are available for 3-, 5- and 7-day rotation periods and are color-coded to correspond to each day of the week. The upper portion of Duo-Dots labels identifies the first day of the food rotation period and the bottom half identifies the last day that food can be used to maintain freshness.