The EZ fusion vial is a new packaging solution for drug reconstitution. The vial allows pre-filling drug and WFI separately into the upper and lower air-tight chambers without intermixing. With a simple twist of the upper chamber, the insulator is displaced and the drug drops to the lower chamber. Gently shaking the vial leads to reconstitution before application. The Product features an anti-counterfeit nature through the twist structure and disallows drug refill. The tamper-evident design makes it easier for people to identify its authenticity. Instant reconstitution provides convenience for aspiration and reduces any possible contamination of patient and healthcare workers.