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Customizable STPs!

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You want it? You got it. Fully customizable STPs - get you a sausage for the urinal!

If you plan to use with gravity funnel products, like the Winkie, please select the "larger urethra" size option -- this will prevent backflow.

The Spouti is able to handle a smaller urethra when placed properly. Forming a vacuum, the smaller urethra causing an increase in urine velocity, aka a harder stream.

For beginners I recommend a larger urethra size just in case you end up preferring to switch between STP products.

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Customizable STPs!
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