We love Wean Green tempered glass containers.
“Our glass is free of nasty chemicals, such as BPA, PVC’s or Phthalates that may be harmful to your child. It is 4-5 times stronger than regular glass as well as dishwasher, microwave, and freezer safe. Our glass is impermeable, 100% recyclable, and will not stain - so you can store your tomato sauce with ease!”
The lids have a silicone seal so they are leak-proof and airtight to keep food fresh. While we like that they are also dishwasher and freezer safe, we steer clear of microwaves altogether so that one is not so important to us.