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- 100% BPA and PVC Free - interlocking cups lock to each other AND to their tray.
- Dry erase function to easily record contents and date (erase prior to Microwaving)
- Microwave, dishwasher, and freezer safe
- Screw on lids to keep food fresh without popping off
- Includes Six stacking 4 ounce cups, tray, and dry erase marker