This is wonderful Mili, so much food is wasted these days, composting it instead is a brilliant way of creating less rubbish and feeding nature! Dividing your invention into different food categories is a great idea, this makes MCM simple and clear to use and, as you have said, is a useful way of identifying which foods we are buying too much of so we can minimise waste in the future. I love the rainbow colours on the categories too in your drawing! Compost will then help feed new crops so we can be more sustainable. I think your invention would definitely help people be more mindful of their food waste, which is a really important thing! Amazing work Mili, thank you so much.