I use an air compressor spray nozzle that has a separate hose to suck cleaner thru as it blows air to create a cleaning spray/mist.
Took an empty plastic peanut jar and drilled two holes in the lid.
Press fit one hose a few inches into lid and leave other end free to suck out whatever needs sucking. Works great for all sorts of things.
Press fit another hose, the one coming from the spray nozzle, into the second hole, a few inches.
It will work to bleed brake lines, just not very fast with the fluid but may work quicker to elimate a lot of air from the new line.
The jar holds a lot of fluid.