Save time and maximize sample recovery with this unique microwave vial adapter system. After a sample is dissolved in solvent and transferred to a microwave vial, this adapter and bump trap assembly allow the sample to be directly concentrated in the vial. The standard taper joint at the top of the adapter provides direct connection to a rotary evaporator. The trap insert is made from PTFE and guards against bumping of the solvents under vacuum conditions while allowing the sample solution to drain back to the vial. Flexible by design, this system adapts to all sizes of standard microwave vials with crimp-style finishes. It can also be used with other vacuum or drying gas systems that utilize standard taper joints.