Always Fresh Containers™ special antibacterial material keeps fruit, vegetables, meats, poultry and bread stay fresh up to 50 days longer than ordinary plastic storage containers, by removing ethylene gases and preventing the growth of mold and fungus and prevents freezer burn! Includes a 26-oz., 37-oz., 64-oz., 91-oz. and 156-oz. with lids. Microwave and dishwasher safe.