BIBS Loops (12 pieces) are meant to be both practical and great fun for your child. They are perfect in the stroller or bed for hanging toys, for playing, and even for babies developing teeth. Use BIBS Loops as a stroller chain, as a suspension in the car seat, over the changing table - only the imagination sets the limits. The BIBS Loops are designed as a multipurpose product to use both on the go and at home. The rings are made of Polypropylene (PP) and contain no harmful ingredients. Polypropylene is safe to use for food since it does not emit harmful chemistry. It is neutral in taste and smell.