“What’s the opposite of ladyfingers?”/“Mentos.”

A riddle about ladyfingers (a biscuit) is:
   
Q: What’s the opposite of ladyfingers?
A: Mentos.
 
The joke was posted on Twitter on October 27, 2010, but became popular when it was posted on both Reddit—Dad Jokes and Reddit—Jokes on January 10, 2018.
 
       
Ladyfinger (biscuit)
Ladyfingers (often called with their original Italian name, savoiardi, or sponge fingers in British English) are low density, dry, egg-based and sweet sponge biscuits roughly shaped like a large finger. They are a principal ingredient in many dessert recipes, such as trifles, charlottes, as fruit or chocolate gateau linings and for tiramisu. They are typically soaked in a sugar syrup or liqueur, coffee or espresso for the dessert tiramisu. They are also commonly given to infants, being soft enough for teething mouths but easy to grasp and firm enough not to fall apart.
 
Wikipedia: Mentos
Mentos is a brand of prepackaged scotch mints sold in stores and vending machines. First produced in the Netherlands in 1948, it is currently sold in more than 130 countries worldwide by the Italian corporation Perfetti Van Melle. The mints are small oblate spheroids, with a slightly hard exterior and a soft, chewy interior.
   
Twitter
Rivka M‏
@RivkaMom
S9: what’s the opposite of Ladyfingers? Mentos!
9:19 AM - 27 Oct 2010
     
Twitter   
Matt Adams‏
@JustDontKnowBro
Manto is the opposite of lady fingers
9:50 PM - 23 Mar 2013
   
Twitter
Binyomin Scheiman‏
@BinyominS
What’s the opposite of lady fingers
Mentoes
#badjoke
9:46 AM - 23 Apr 2014 from Des Plaines, IL
   
Twitter
Beth Brambleberry‏
@BethBramblebrry
Ruined #TheFreshMaker for SIL when I noted that the opposite of lady fingers are Mentos.
9:48 PM - 29 May 2017
 
Reddit—Dad Jokes
What’s the opposite of ladyfingers? (self.dadjokes)
submitted January 10, 2018 by samfox11223
Mentos
 
Reddit—Jokes
“Son, do you know what the opposite of ladyfingers is?”
submitted January 10, 2018 by samfox11223
“No dad,” I say rolling my eyes.
“Mentos.”
 
Twitter
Shower Thoughts‏
@Thoughts4Shower
The opposite of ladyfingers are mentos
#showerthoughts
11:47 AM - 10 Jan 2018
 
Twitter
Andrew of the House Fruci, first of his name‏
@PapaFruci
Mentos are the opposite of ladyfingers.
8:13 PM - 10 Jan 2018
 
Twitter
Darsan‏
@DarsanParmar32
“Son, do you know what the opposite of ladyfingers is?”
“No dad,” I say rolling my eyes.
“Mentos.”
3:36 AM - 11 Jan 2018