So I was at Harbor Freight today and picked up this brake bleeding kit for
$30.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92924
On further inspection it seems to be a gizmo that produces vacuum using
shop air. However, the bottle on the left and the clips shown seem to be
a clever gizmo for keeping the master cylinder reservoir filled while
vacuum-bleeding the brakes. I'm tempted to keep the kit just for this
gizmo, unless someone knows an equally clever gizmo for keeping the
reservoir full while vacuum bleeding.

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Harry Smith - 04 May 2007 01:49 GMT
> On further inspection it seems to be a gizmo that produces vacuum using
> shop air. However, the bottle on the left and the clips shown seem to be
> a clever gizmo for keeping the master cylinder reservoir filled while
> vacuum-bleeding the brakes. I'm tempted to keep the kit just for this
> gizmo, unless someone knows an equally clever gizmo for keeping the
> reservoir full while vacuum bleeding.
You can just turn the bottle upside down in the reservoir. Punch a
smallish hole in the foil so it doesn't gush when you flip it. Works
like one of those pet water jugs you see.
Harry