E.B.
I don't know about a glass container such as you describe, but if the purpose is to have food safely packed in a non-plastic container, you might try: www.lifewithoutplastic.com and/or www.lunchbots.com. Both of those sites offer stainless steel and culinary-safe wood products intended for food storage and transport, and both have kid-friendly sites. On the Life Without Plastic site, look under "child and baby products" and you'll find children's lunch box sets.