I use this Glass+ Food Jar | 15oz for leftovers and soups, and the glass interior is the main reason I picked it. It's 100% plastic-free, which matters to me, and the insulated stainless steel outside keeps things at temperature without the fragility of plain glass. It's not as light as an all-steel jar, but it goes places regular glass can't, so I take it to work and on short trips. Cleaning is easy and no lingering smells. Solid pick if you want glass contact with your food.