Containers made with a proprietary combination of special natural substances Helps you get the most out of your baked goods and snacks Shown in independent lab tests to keep your food fresh longer Unique, proprietary combination of natural substances create a beneficial storage environment Helps prevent texture changes and flavor loss Proudly made in the USA Washable, reusable, microwave safe and BPA-free Use in the fridge, on the countertop or in the pantry; anywhere you normally store the contents of the boxes Also great for storing and microwaving leftovers Breadbox set Designed expressly to help you store your store-bought and home-baked breads Stackable design Space-saving convenience and stability Keep your kitchen and pantry organized and looking great Channel-seal system Helps to minimize air and external contamination Tabbed corners on lids Easy opening and closing The Basics Measurements:Approx. 13-1/4"L x 6-1/2"W x 5-1/4"H each Material Composition:Polypropylene BPA-Free:Yes Microwave Safe:Yes Dishwasher Safe:Top rack recommended Country of Origin:USA