These are called glass accessories, which are accessories to decorate a glass cup. Unlike a glass marker, these are created with more emphasis on decoration. As you can see, some glass cups curve inward, some outward, and some are straight, but no matter the type of curve, these accessories are designed in such a way to face upwards from any position depending on how they are attached. I am the one creating the designs. I also make the molds and then place orders with factories, so the accessories are all produced in Japan.
The top part is made with tin alloy that is also produced in Japanese factories. Lead is normally used to increase fluidity of the alloy, but we do not use lead so our products are safe. Silicone rubber is used for the piece that connects with the glass, and it is the same material used on the ends of baby bottles. As for sales, since February 2011 I have been wholesaling my products to department stores, variety stores, and bridal vendors, and I would like to expand sales moving forward.