Pickled cucumber
Cucumber pickled in brine, vinegar, or other solution
Is pickled cucumber ever red?
Koolickles are a variety of pickled cucumber made with brine and red kool-aid. Korean cucumber kimchi is flavored with korean pepper powder. Korean pepper powder is red in color. 
What are the Koolickles made from? What is Korean cucumber kimchi flavored with? Are any of #1 or #2 red in color?