Lisa, I'm so sorry to hear that Whisper and Munchkin have passed away. I'm so glad that it wasn't due to FIP though.

If you want food names then how about:
Nacho & Cheeto
Sunny Delight & Orange Julius or Sunny D. and O.J.
Salsa & Tabasco


Or how about:
Harley & Davidson
Ben & Jerry
Butch & Sundance
Felix & Oscar
Bert & Ernie
Rowan & Martin
Starsky & Hutch