mighty vac help

I have a box of these things I never use anymore. The metal ones will corrode over time and seize up.
I made a vac bottle to bleed brakes. Its an aluminum cylinder that I connect an hvac pump to. Its a breeze to bleed brakes by myself and it can also be used for fluid transfer. Removes fluid with vac and also has an air fitting to pressurize to remove fluids. Its not a real portable setup but works way better than a mityvac.