This is a sturdy insulated bag from Yogurt Four Seasons with an aluminum coating for excellent cooling effect. It has a good gusset, and buttons on both ends to prevent it from expanding, allowing you to adjust the capacity. There are also buttons at the ends of the zipper, so it seems unlikely to open due to vibration. I used it only once when I received a souvenir. The illustrations on the bag are also cute. I don't see any stains, but since this is a used item, please refrain from purchasing if you are concerned about minor details. - Color: White - Brand: Yogurt Four Seasons - Illustration: Design of a cow and a windmill - Inner material: Aluminum coating Thank you for looking.