BONBON DROP 3D character sticker set, 2 sheets, made of PVC with various designs. - Brand: BONBON DROP - Design: 3D character stickers - Material: PVC - Quantity: 2 sheet set Thank you for viewing. I bought this online, but I accidentally bought the same item, so I am selling it. The inside is hollow and made of plastic. Would you like to trade stickers? Thank you for your understanding.