From brakes to oil:
I got those images from
http://tooldesk.com
No direct links. Search for mityvac.
This is not any sort of endorsement of this vendor, since I was just 'borrowing' pictures from them.
BTW, I noticed the pneumatic one has an 8.8 liter capacity.
There are a gazillion vendors for these things.
Harborfreight also carries some models on these.
They also have a 6.25 GALLON pneumatic extraction device for $130, but it looks like the actual 'fine print' capacity is 4.25 gallons:
http://www.harborfreight.com/6-1-4-quarter-gallon-oil-extractor-46149.html