Which overflow/recovery tank???

I ordered this recovery tank set from Jegs, but then ran across a thermos that I REALLY would like to hollow out and make one out of it.
My car already has some unique accessories on it and this would fit the bill real nice.

Here's the one from Jegs and the pic of the shot shell thermos.
http://www.jegs.com/i/JEGS+Performance+Products/555/51136/10002/-1