Unfortunately (for you) I bought it locally in Poland, but I'm pretty sure that you can get similar on AZ. Mine cost ~$15 for 5pcs.

E.g.:

http://www.amazon.com/KCH-06093-Rectangular-Shaped-Vacuum-Sealing-Food-Storage-Containers/dp/B001A5W7L4/ref=sr_1_23?s=kitchen&ie=UTF8&qid=1458938367&sr=1-23&keywords=Vacuum+container