It is a procedure in which a small scope (like a flexible telescope) is inserted into the bladder and ureter and it is used to diagnose and treat a variety of problems in the urinary tract. For ureteral stones, it allows the urologist to actually look into the ureter, find the stone and remove it.
The answer, though, is within reach: cold-brew coffee, a style that has enjoyed a recent resurgence for its natural sweetness, its lack of acidity and its simplicity. While a hot cup of coffee will have a stronger aroma and flavour, heat also brings out the bitter flavours of a bean.
Iced coffees are made in a variety of ways, but essentially they come down to two formats. First, you can make hot coffee the way you normally would and then cool it by letting it drip directly into ice. The second format is a cold-brew. With this method, as the name indicates, the coffee is never hot.