Mixing Fluids in Space (Earth, theory, sound)

[DanBayley]

Hey, I just came across this idea that sounds really cool in theory, but I'm wondering if anyone out knows if it's actually technically possible:

Mixing Fluids in Space Marblar - Mixing Fluids in Space

This tiny device as it passively mixes fluids in milliseconds, so experiments, such as microgravity experiments, can be carried out easily in space.

However, I'm not 100% sure that this is needed commonly enough for the concept to be followed through. What do you guys think? Do you know other areas where fluids need to be mixed in space in such a way?

[GregW]

A simpler device is used to mix epoxy resins in disposable tips on cauking guns here on earth. They are simple, cheap and get the job done.

[DanBayley]

Cheers Greg, the guns sound pretty interesting, how come they are simpler and better?