I bought these for a trip and used one in advance, but it was rejected. I'm open to selling them as a set or individually. If sold individually, they are 300 yen each. One box is 1000 yen. Please contact me via comment. I will edit the listing for the buyer. - Brand: chu-bol - Capacity: 250ml - Quantity: 4 pieces per box - Function: Milk suction control function - How to use: Instructions for use are included Thank you for looking.