I'm selling this because I preferred glass baby bottles (；；) ~The following is from the official website~ [Product Features] <Official Store Exclusive! Disney Princess Design> The bottle is a "Milk Realization (R)" baby bottle that uses T-Ester, a new material with the transparency of glass. It is clear and highly transparent, yet it is a new plastic material that has the "lightness" unique to plastic. It has high heat resistance (110℃) and can be sterilized by boiling, steam, and chemical solutions. Comes with a Milk Realization nipple (for 3 months and up / M size, Y-cut). *This product is the Milk Realization baby bottle (3rd generation). <Features of the Milk Realization Baby Bottle Plastic 240ml> ・T-Ester is a new plastic material with high transparency that complies with the Food Sanitation Act. ・From 3 months, comes with a Milk Realization nipple M (Y-cut) ・Supports the three principles of breastfeeding: "attachment," "sucking," and "swallowing." "Attachment" support: Close to the breast, soft texture that does not hinder smooth tongue movement "Sucking" support: A snug curve that fits the mouth, a latch-on guide "Swallowing" support: The shape of the suction hole is designed to match "growth and development" [Raw Materials] Parts: Hood, Cap Material type: Polypropylene Parts: Nipple Material type: Synthetic rubber (silicone rubber) Parts: Bottle Material type: Saturated polyester resin Sterilization/Disinfection Method Boiling/Steam 〇 Chemical solution 〇 Microwave × [How to Use] From 3 months <Guidelines for using Milk Realization> For babies immediately after birth (suction hole shape) SS / 0 months and up Round hole Drinking guideline: About 10 minutes for 50ml S / Around 1 month Round hole Drinking guideline: About 10 minutes for 100ml M / Around 3 months Y-cut Drinking guideline: About 10 minutes for 150ml L / Around 6 months Y-cut Drinking guideline: About 10 minutes for 200ml LL / 9 months and up Y-cut Drinking guideline: About 5 minutes for 200ml 3L / 15 months and up Y-cut This is the completion period of weaning. Please use it according to the state of weaning. The age is only a guideline. Please see the product Q&A on the customer support site for details.