These are IKEA's ISTAD ziplock bags. Versatile Convenient 6-liter and 4.5-liter ziplock bags, 15 bags each. I heard on YouTube that they are useful for compactly packing clothes when shipping, so I bought them. IKEA ziplock bags are easy to use, convenient for shipping, for small portions to share, and for storing cosmetics. I ended up buying them in bulk online. I bought them in bulk because I wanted to put clothes in them. They are also convenient for travel. And for shipping! Due to thickness constraints, these will be crumpled slightly when put into the mailbox. However, for hygiene reasons, I would like to use this method to ensure the contents do not come into contact with others. To release air when putting them in the mailbox, I intentionally loosen the seal of the bags before placing them in a shipping bag for delivery. It's possible I might order them again with other IKEA items if I forget something. Although I said this was the last one, I'm listing this because I've decided to use up the green ones first after taking out the pink ones for myself. ⭕️For those who prioritize cost-effectiveness⭕️ I would appreciate it if you could understand that it's okay as long as the contents are used. If you are a perfectionist, I recommend purchasing from someone else who can ship them in their original box in pristine condition, so please refrain from buying here. Thank you for looking, including my profile. I am listing cigarettes, but it is for point redemption. I have allergies to dust, etc., so I live in a home without smoking or pets.