Review on WirthCo 72300 Funnel Measure Container by Wayne Laguna

I bought 2 of these because a reviewer said it was good for diesel fuel additives. I put a 911 diesel in one and a cetane booster in the other. I kept them in the door of my F350 for easy access, but they both leaked out of the side seam. It made a mess and stunk in the cockpit. I wasn't that surprised, just hoping they would work with no leaks. Now I use a glass that I measure before I leave and it doesn't fit in the door, I have to put it in my cup holder but at least it doesn't leak.