The Sippy Nipple fits most 8 oz. and 16.9 oz. US water bottle brands. Purple Ring fits Aquafina, Dasani and Deja Blu bottles that have a taller screw cap closure.

Green Ring fits all Nestle water brands including, Nestle Pure Life, Arrowhead, Deer Park, Ice Mountain, Poland Springs, Ozarka and Zephyrhills.(SippyNipple is not recommended for the following water brands that have unusual bottle necks or closures: Fiji Water, Evian, Hildon, Icelandic Glacier, Saint Géron, Glaceau Smartwater, Volvic, and Voss.)

Dr. Mike’s SippyNipple Comes in 3 months+ and 6 months+ Nipples, and a Toddler Spout for teething babies.

Starting with a slow flow nipple is ideal for newborns and preemies. As your baby grows, they are ready for faster feeding and a faster flow. Sippy Nipple offers two sizes custom designed to meet your baby’s needs that are designated by age (3 months+ and 6 months+). Don’t be concerned if your baby doesn’t exactly follow these guidelines, you may have to play with nipple sizes to find out what works best for your baby.