I have mastered the nipple style stp,  I can use it every time without messing up,  but they break often!  The nipple becomes detached or the tube breaks and I have to constantly fix it.  This lead me to purchase the model D stp which does not break,  but I can't pee consistently and keep wetting myself.  Does anyone have any suggestion?  I can't bare sitting to go.

I bought my stp from tranzwear with a medice spoon. First time I used it and my first stp ever and I never have any 'accidents' with it. It's also only around £22.

How would you feel about a non-phallic STP like the p-style or the "go girl"? While the name of the last one might be triggery, the device itself comes in camo-colored silicone and is not at all girly.  I've found the trick with the model D is keeping a firm seal on the back and leaning forward a bit.  Two hands usually works best, but the hand position recommended for the "go girl" is also pretty effective (shown on the FTM essentials page)

The p-style ALWAYS works, never breaks or leaks, does not draw much attention (in the clear color), and is cheap enough to have a bunch of them around.  The only problem is they are not flexible and bigger than pocket size.  Truly, NEVER wet my pants with it...