Instant purchase OK!! ※ This is an authentic Pigeon hospital-use (direct-attach type) Mother's Milk Real nipple. Compatible bottles are only the hospital-use bottles (direct-attach type) Mother's Milk Real KR-50, KR-100, and KR-200. Large flow (for babies 3,500g and up, until weaning) 【Material】Silicone rubber ※ When shipping, the tip will be flattened to reduce thickness, but it will return to its original shape because it is made of rubber. Please be aware of this.