Crack the Sunday Puzzle with "The Big IF"

In this week's Sunday Puzzle, called "The Big If," listeners are challenged to come up with familiar two-word phrases with the initials I-F. The challenge includes 11 clues, such as "digit that's next to the thumb" and "substitute for breast milk in a baby bottle." Additionally, a listener-submitted challenge asks for two brands of household products, each in three syllables, with all syllables in the two brands rhyming with each other.