I believe this is from about 30 years ago. It may have been used. I washed it lightly before listing it. The bottom is flat, but it's a round, plump glass. One of them returns to its original position like a roly-poly toy even if it's knocked over. Set of 2 Weight of one: Approximately 76g I will ship it using Rakuraku Mercari Delivery, Takkyubin 60 size, in a cardboard box (used). Please refrain from purchasing if you are nervous about home storage. ★★★★★★★★★★ If you have any questions other than the description and images of the items for sale, please comment. Please understand that there may be oversights due to amateur inspection. Sizes are measured by amateurs. Please make your judgment based on the product description and images. There may be discrepancies in the measuring position. If you are at all concerned, please comment with the exact part you want me to measure. Even then, there may be errors, so please understand. I will compress miscellaneous goods and fabric products such as clothing. I will fold them to fit within the packing size, so I may not be able to fold them neatly. Please understand wrinkles. The size, design, color, fabric, and material may not be conveyed well in the product images. There may also be insufficient explanations. Please ask questions if you have any concerns. I can offer a small discount for items that can be shipped together.