Duck House Sports proudly presents its Glass Food Containers. Made of highly heat-resistant Borosilicate Glass, our food containers are easy to clean, microwave, and dishwasher safe (without lids). Each Glass Food Container features four easy open-and-close latches, which provide an air-tight seal to lock in freshness, and rule out leaks. Six pieces can be nested together to form a perfect set, and to save space. BPA free.