This is a lunch bag with an inner aluminum insulation sheet. Please use it with a cold pack. The size of the sample lunch box in the third photo is approximately 10cm long, 15cm wide, and 6cm high, but it fits with room to spare. For combined shipping via Nekopos, we will discount the second item by 200 yen. This is a handmade item made as a hobby. If you are looking for perfection or are concerned about minor details, please refrain from purchasing.