L is recommended for beyond M and Y sizes for baby's requirement. It is recommended that mothers select proper hole sizes to enable baby to have the ideal feeding time of 10 to 15 minutes during each feed.

Nipple Features:       

   
Super-Stretchable
Teat section has an "accordion-like" portion that enables it to stretch in response to the peristaltic movement of the baby’s tongue.  At PIGEON, we believe that stretchability is the most important function of an artificial nipple in encouraging baby’s natural suckling.
              
Ultra-Soft Silicone
The nipple’s surface is very soft, yet it does not collapse easily.  Made from thick ultra-soft silicone material, the nipple has similar elasticity to that of a mother’s actual breast.  The dome-like shape makes baby’s mouth open naturally, and supports its mouth softly and fitting its lips gently.

By adding M and L sizes to the PIGEON Peristaltic Nipple product range, the softness of each nipple is approximately controlled to ensure the best performance at each developmental phase of your baby.  Similarly, different hardness of silicone material is matched accordingly to the size of the nipple.  Therefore, each size of nipple is appropriately shaped with the softness of the material.