There is a shallow depression on the lid so that jars can be stacked stably on each other without sliding or getting wobbly. And you can quickly recognize and get the ones you want. More importantly, this greatly saves storage space.
The dry erase marker included in the package is for writing names, dates or other information on lids to remind you what’s inside or when made it.
What's included in the product?
16 pack 4oz food containers with four colors of lids, and 1 erasable marker.
Is it safe for microwaves, dishwashers, and refrigerators?
Yes. It is safe for dishwashers, microwaves, and refrigerators, but remember to remove the lid before heating in the microwave.