Make sure the glass is lead free though, I was shocked at how some natural materials still contain heavy metals…stainless steel typically contains nickel which is a neurotoxin…soon look for stainless steel that is 18/0 meaning no nickel
Absolutely agree about it being lead free. It seems like the Pyrex/snapware tests negative for lead. https://tamararubin.com/2017/03/snapglass/ although this is just one source found from a quick google search
JoyJolt JoyFul 24pc Borosilicate Glass Storage Containers with Lids. 12 Airtight, Freezer Safe Food Storage Containers, Pantry Kitchen Storage Containers, Glass Meal Prep Container for Lunch https://a.co/d/eUfIUtA My boyfriend got me these like 2 years ago and they’re great
I use silicone ice cube trays for purees. Some come with snap on lids so you can make/store them in the same container if you want.
https://a.co/d/gFAOP1z I use these! They are freezer safe as well. I can usually find them at Costco also.