I see the snap lid glass containers at stores like Marshalls and TJ Maxx but wasn't sure they were actually leakproof. I've read mixed reviews on these types of containers. But if they're leakproof, I would buy one as they are under $10. I don't need a set, one will do.
Yep, I looked through all the thermos on Amazon, if I can, I would like to avoid a $20-40 purchase. There are some under $20 but they are usually just a bit on the smaller size. Ideally, I'm looking at about 20oz.