Reddit reviews Pyrex Storage Deluxe 8-Piece Set with Lids
We found 1 Reddit comments about Pyrex Storage Deluxe 8-Piece Set with Lids. Here are the top ones, ranked by their Reddit score.
Vented lids allow steam to escape while in the microwaveSnap-on-the bottom lid prevents lids from being lost or misplaced and allows for compact cupboard nesting without glass to glass contactFootprint on the lid allows for easy stacking during refrigerator/freezer usePyrex glass is safe in the oven, microwave, refrigerator, freezer, and dishwasherMade in the U.S.A.
I respectfully disagree. This is the air vent cap from certain sets of Pyrex glass food containers. See here. We have a set, and that is most definitely the air release cap from them.
Further: you can google image search: Pyrex steam vent for multiple examples.
Also a sippy cup valve would have a small hole or perforation to let liquid through. This clearly does not.
EDIT: found one of ours. Sorry it's not clean, it was in someone's lunch box.