After each use, I washed and sterilized everything in the microwave. The last time I used them, I sterilized them, dried them thoroughly, and stored them in a Ziploc bag. I also have two SS nipples from the Milk Consultation Room and one M nipple from the Milk Realization series, but I won't include them because they show signs of use. Since there will be shipping costs, I would prefer to sell everything as a set. ① Pigeon Glass Bottle, Milk Consultation Room, 1 bottle There is no outer box or instruction manual, only the bottle and cap. I purchased it in 2022. I used it every time I fed my baby for one month each in 2022 and 2025, but after that, I only used it once a day until my baby was about 3 months old to get them used to the bottle. I think it's in relatively good condition. ② Milk Realization Nipples, M size (1), L size (2) I used the M size for about a week in 2022, once a day, but I stopped using it because my baby refused the bottle. It looks a little yellowed, but it's almost unused. I tried the L size a little bit when my baby refused the bottle in 2022, thinking it might be the wrong size, but it's almost unused. One of them should be unused, but it has been opened. I think they are in good condition. ③ Milk samples I can't use them because of a milk allergy, so I'm giving them away. Icreo powder, 100ml for 7 bottles Hohoemi Rakuraku Cube, 20ml for 5 cubes in 1 bag Both have an expiration date of July 2026.