Oli&Carol’s Lemon Rattle Toy is as eco-friendly as can be! Its exterior is made of 100% natural rubber, and inside are UPCYCLED CHERRY SEEDS that turn this teether into a rattle. 2 in 1! This rattle toy has been designed hand-to-hand with certified otorhinolaryngologists, and have been able to create the perfect sound pitch that will help babies calm down, rather than overstimulate! Filled with incredible textures & details that will help stimulate baby’s senses while teething on them!