I used these occasionally when I was in kindergarten. They're great for separating fruit and dessert, and they nest together for compact storage. The smallest light blue one is unused. The large one might fit about 3 large Shine Muscat grapes? It's a mini size. Material: Polypropylene Large, Red: 350ml Medium, Green: 205ml Small, Light Blue: 90ml All are heat resistant to 140°C and cold resistant to -20°C.