Oli & Carol toys are made from 100% natural rubber. And this raw material comes from sustainable Malaysian Hevea trees. The natural rubber is then placed in individual molds - and when ready, is hand painted with food grade dyes. PVC, BPA, Phthalates and Nitrosamines free - and ASTM certified by Bureau Veritas. These toys are designed with no holes - preventing the presence of bacteria and mold from forming on the inside so your little one can engage in safe and worry free play!