Most of the fluorescent sticks are strip-shaped and wrapped in polyethylene (plastic) with a glass tube in the middle. The liquids inside and outside the interlayer are peroxide and ester compounds respectively. After bending, beating and rubbing, the glass is broken, which causes the reaction of two compounds and makes the fluorescent dye glow. Glow sticks can be used for entertainment, night fishing, wedding, outdoor, military, engineering construction, underwater operation and so on.