I have a women's tie string bikini bottom that I found at Walmart during closeout for around $4 and have since modified it to be a no tie. They are the small size. There is just barely enough material to be able to squeeze in and fully cover my balls, whereas, in order to get my member in it I tuck it straight down and under.
The tiny bikini rides extremely low in front and is quite enjoyable to wear. It does expose the top base ,portion of my member, but with a good shave it blends in well as just a large bulge in my skin. My bulge holds the bikini in place from slipping down even further.
Not as comfortable though as a male string bikini with a pouch due to I am well endowed.
https://www.walmart.com/ip/Op-Junior...ottom/48843254