Sistema BPA-Free Reusable Food Storage Sandwich Container, Green, 1-Pack SPECIALLY MADE FOR SANDWICHES: Containers specially made for sandwiches fits standard sized sandwiches. AIRTIGHT: Keeps your sandwich fresher longer. FREEZER AND MICROWAVE SAFE: Want your sandwich cold or hot? No worries! DISHWASHER SAFE: Easy to clean. BPA FREE: This product reduces your exposure to harmful BPA (bisphenol A), a compound found in many plastic products related to adverse health.