I have the BK7 and my pouch will fit an Altoids tin PLUS a full bottle of Potable Aqua. I was also able to slip a 2x3 signal mirror behind the plastic knife insert (on the back side of the sheath) and a half liter plastic water pouch (not a milk bag but similar).

I have actually never completly finished the Altoids tin kit, but the usual suspects are in there. <img src="/images/graemlins/grin.gif" alt="" />

I keep this knife in my car kit. It is a good value I think for the money. I have seen someone post a kit stored under the plastic knife scales but I have never gone that far.