MASTERSEAL MICRO BOX Food Conservation will guarantee optimal preservation for all your food. Its closure system is innovative with its 4 clips for easy opening. To heat your dishes in the microwave, you just have to open the valve. In addition, its fresh seal guarantees no germs between the lid and the seal. Compatible microwave, freezer and dishwasher safe. 100 Percent Microwave Safe - Just open the valve before putting the box into the microwave 100 Percent Leakproof: The innovative seal ensures the freshness of the food as well as the absence of microbes Made in Germany for 30 years Bisphenol A (BPA) free, certified for baby food Freezer and dishwasher safe