Glass containers for better waste-free freezer storage

In my quest to avoid single-use plastic, I freeze all my food in glass containers & surprise bonus — it’s much more resistant to freezer-burn. My food (& plastic) waste has reduced dramatically with freezer-safe squares/rectangles (eg IKEA) for meats, etc, and Mason-type canning jars of various sizes for soups, stacked muffin-sized handfuls of blanched vegis to throw in soups/stews, etc., little bits of roasted red peppers, tomato paste, herbs, etc.

FANTASTIC – the containers are consistent sizes & shape, stack efficiently in both chest & fridge freezers, easy to label lids with erasable china markers & no plastic bags to buy or dispose of. I’ve had NO breakage in 3 years of doing this. Only 2 conditions:
1) must have ABSOLUTELY straight sides (no ‘shoulders’ at all, so max 750ml size)
2) You just need a little more forethought to start defrosting night before or early in the day – no prying frozen contents out with knives.