I purchased this onyx Eats in a 21oz size. I’ve been using this Eats for a couple? Of months now. I use this size for lunches. I have leftovers from the night before. In the morning I will heat up the container inside real hot w/o the lid. By noon it’s still warm. This size 21oz is good for lunch. For dinner I think you might want to have the small Eats too for a salad,soup or dessert to be full. I have both size’s.