My husband builds models and often mixes paint or resins. These cups are perfect for his use, and he says this package is probably a lifetime supply for him! I do some acrylic painting, so I may help him use some of the supply. ;o)The cups are very lightweight and soft, not hard. The measurements are written on the side.The cups are made of recyclable materials, but may not be recyclable after using them with paint or other chemicals.If you need small measuring cups for any purpose, these shouldSee full review