1:12 Scale Miniature Lunchbox Silicone Mold (2 Sizes) - Perfect for UV Resin, Epoxy & Clay Casting - Ideal for DIY Crafts, Miniature Food Making & Model Scenes - Nisshin Associates 1004

This is a hobby tool for Kameshima Shoten "Clay Jewelry Die-Cut Lunch Box, 3D Mini" This "tableware collection" is perfect for miniature sweets, miniature breads, miniature food, dollhouses, and more. The silicone material is flexible and UV permeable, and can be used with 2-part epoxy and UV resins. Jewelry UV Resin LED Plus (From Amazon.co.jp)