Does anyone own this STP? I bought it awhile back and just can't seem to make it work. Any tips?

I personally havent tried this STP before but i do know of a good review of it. Here it is http://www.theselfmademen.com/reviews.htm#899252024

Also, i have tried similar designs before and my only advice is
1) dont hold it too firmly
2) you dont want it placed too far back, if its placed slightly forward it will create a nice seal and shouldnt back flow.

Hope this helps at least a little bit!
-Alex

I will try placing it forward more.. tho that usually causes it to leak out the back. I guess practice makes perfect.

These light silicone ones are very tricky. I'd say you are probably holding it too tight. Although getting myself not to hold it too tight is VERY hard. You want to do the opposite of what you need to with this. If you are on T, it sometimes can change how to line stuff up. I couldn't even pee in a cup for awhile.

--Jay