Bests & Worsts Reviews from Amazon

I was going to buy Pyrex, but then I found out they switched from using borosilicate glass to tempered soda-lime glass in their USA products. That soda-lime glass is not as tolerant of fast temperature changes, and although it is rare, it can occasionally EXPLODE if you place a hot container on a cool surface. But these here are true borosilicate glass containers and I expect them to be safer when I go from oven to freezer to microwave. The lids are a very solid tight fit, which is great for me if I use the container to take lunch to work in my backpack (it's the perfect size for that!). However, the lids are SO tight that unless you have two hands of normal adult strength, you might have some trouble snapping them into place. Therefore I would not recommend these for elderly or disabled persons.