How full should a 20 oz cup be filled with ice for a medium iced blackout?

For a medium iced blackout, filling the 20 oz cup 3/4 full with ice is the correct approach for several reasons. Firstly, this ensures there is sufficient ice to provide the desired chill and dilution to the beverage without overwhelming it. Ice not only keeps the drink cool but also impacts the drink's overall texture and experience.

Filling the cup too full with ice could limit the amount of beverage that can be added, which might lead to a less balanced drink. Conversely, if the cup is not filled with enough ice, the drink may not stay cold for as long, and it could become diluted too quickly as the ice melts. A 3/4 full ice level strikes a perfect balance, allowing the drinker to enjoy a refreshing beverage while still getting the right ratio of ice to liquid.