ChargePoint Technology sell "Vibratory Collar"

Assists powder flow from rigid ChargeBottle containers, ensuring maximum yield when handling poorly flowing or sticky powders. This modular, pneumatically powered vibratory clamp can be fitted to multiple containers to aid discharge of powders with inherently poor flow characteristics, and a simple over-center latch secures it firmly to a container while allowing it to be moved between containers for cost-effective use.