My go to for most swimming and water stuff is a ShockDr core supporter without cup pocket, I think its style 216 for a single pack and 226 for a twin pack. It was recommended to me by a much younger friend who used to be on here and I have been keeping it handy in my swim stuff for a couple years. Never stretched out, dries faster than others I have, waist it less than 2 inches and is the same waist as they use on a lot of their compression shorts so if others noticing you are wearing a jock bother you, this isn't as blatant as some others to announce that in a family environment if that is an issue to you. Plus the chlorine doesn't seem to have done any damage to it other than maybe lightened the waist over 2 plus years of use. Not sure if they are available at a store near you or you would need to order. This is more of a hold everything in position type jock than a grip-snug-control bounce kind of jock.
I have known a couple other guys who took it upon themselves to go to a jock for swim underwear and made their choice based more on availability and bought the Mcdavid swim/run supporter. Its industrial enough, holds up well, supports decent. Waist is thin an not real obvious if it shows above your shorts, white with a black stripe, pretty tame.
I have a SafeTgard swim jock I have had since college and it still does good and is comfortable, just much more faded than the original deep navy color it was, probably not readily available at a store near you.
I have a few old Bike swim jocks that are literally 15 plus years old, love them but as they became less available I quit letting them be my go to jocks for fear of totally wearing them out.
I have a Duke that has been around since high school and it is all but thread bare but will still do its job and I love the fit and feel, its great.
