I'm not sure what lid this is, as it has been stored at home and never used, but based on the product number printed on it, I believe it is a lid for a MagMag product from the company OSK. It is new and unused. Since it has a nipple, it seems suitable for practicing drinking from a cup after milk. It will be shipped via standard mail. Negotiations for price reduction will be declined. I will be unavailable from the evening of January 10th to the 13th, so purchases made during that period will be shipped on or after the 14th. I apologize for any inconvenience, and thank you for your understanding. - Color: Yellow - Material: Plastic - Parts: Nipple - Parts: Cap - Parts: Transparent cover