MAM Bite & Relax 2Teether. A light, small and convenient teether in a practical sterilization box is designed for the second stage for baby’s back teething phase. The teether promotes the development of a healthy jaw and promotes active learning. 4 different structures and 2 different materials offer a quick relief of gum itching by gently massaging them. The 3D Shape is specially designed for back teeth. Very easy to hold. Trains baby's fine motor skills.