I've been a devoted fan of White Castle for as long as I can remember, so the concept of slider burgers has always held a special place in my heart. In the late 1980s, Burger King hopped on the mini-burger bandwagon by introducing a set of mini-burgers known as the Burger King Buddy, conveniently sold in threes as the Burger King Bundle. My friends and I absolutely adored them, and here's why.