Features: 1) Material: silicone rubber+ metal ring 2) Environmently friendly products 3) Soft and does not hurt body 4) Different colors and sizes available 5) Glows in dark 6) Sensitive to light or temperature 7) With debossed or embossed logo 8) Special shiny effect on surface 9) with cheapest charge of opening mold 10) Ideal for fashion accessories, gifts and promotional gifts 11) Customers' designs are welcomed