I bought a vacu-seal made by a company called pack-mate. It was around 25 bucks bought online. The bags are ziplocks with a small attachment that connects to the suction device.

The ziplock portion of the bag seals fine but the attachment on the bag for the suction device tends to leak.

I had some sticky putty (packaged as a sticky stuff to hold posters and such on the wall). After shoving a bit of that into the attachment after i've vacuumed the bag I've had no more leaks.