This mini Miracle Nipple is designed for your newborn fur baby. I recommend that before the first use that you clean it in warm sudsy water using a cleaner such as Dawn dish washing liquid. Always rinse thoroughly and wash in between uses. This nipple features a pre-made hole and a kneading pad for small hands to knead on, similar to what they would naturally do while nursing their moms. It will fit on any slip tip or luer lock tip syringe or small nurser bottle. Your baby from us has been using this nipple with the tiny bottle.