Thank you for viewing. It can be sterilized in the microwave, and can be stored in the case after sterilization. This is a Pokémon collaboration product. My daughter was born last year, so I bought it as a used, good-condition item and used it for about six months, but I am selling it because sterilization is no longer necessary. I was breastfeeding, so I used it 2-3 times a week, but it was convenient. There are small scratches and limescale marks, but I think it can still be used. - Outer box, instruction manual included (part of the box is torn) - Easy sterilization in the microwave Simply put the case with water in the microwave and steam sterilize in just 5 minutes. You can steam sterilize 4 baby bottles at the same time. - Compatible microwaves Household microwave ovens (output 500-700W) Width 26.5cm or more x Depth 26.5cm or more x Height 13.0cm or more * Please note that some microwave ovens have protrusions inside the oven. It can also be used in flat-type microwave ovens. Target age: 0 months and up Size: W253xD125xH205mm 585g - Please be sure to check the condition in the images. - Used children's item / stored at home It will be washed, disinfected with alcohol, etc., and then packed in a box for shipping. Please purchase only if you understand. There may be oversights due to amateur inspection. Thank you.