The Grape Baby Rattle & Teether from Oli & Carol makes a big claim to be the greenest rattle out there, but we have to agree. First, it's made with 100% natural rubber, with hand-applied decorations in non-toxic natural pigments. The really amazing bit is that they've used upcycled cherry seeds to turn this teether into a rattle, creating the perfect sound pitch that will help babies calm down, rather than overstimulate them. It's a brilliant bath too and, because it's made in one piece, it's very hygienic, as it won't collect water inside.