flashing beer glass, 1) red, blue, green or seven colors 2) Ag 13 batteries 3) PS material 4) switch on/off of the bottom flashing beer glass,1) Flash with red, blue, green or seven colors2) Waterproof ,PS material3) With custom logo is welcome4) Ag 13 batteries include5) great for party and events and festival6) top quality and fast delviery7) reasonable price and good servies flashing beer ...