2-in-1 Glass Training BottleSimple to use, evolves as the child grows and is made of healthy material 2 in 1: a bottle nipple and spout to encourage transition and learning, with 2 rings to easily interchange them Removable silicone cover: protects the glass bottle and ensures better grip Removable handles: easy grip for little ones, they can be removed afterwards if needed 100% watertight: with or without the lid, it doesn't leak Main body in glass: solid and healthy material