Our glass base is made out of tempered glass that makes it 3-5 times stronger than a regular glass.
Our lids are made out of polypropylyne, #5, plastic with a food grade silicone seal.
Yes, we make sure no nasty chemicals come anywhere near your food.
The containers can be reheated without the lid up to 250F.
We recommend the containers being left at room temperature for about 15 minutes so that there is no temperature shock.
You can remove the seal using an object with a rounded edge so that it does not damage the seal. We recommend using the rounded end of a paper clip. For more instructions please watch this video.