mrbreakfast.com

X0JDX TIL in the mid-1980s there was a Nerds cereal and that the box had two separate compartments and each compartment had its own flavor. It also came with a mail-in offer for a two-sided Nerds bowl that had a "Nerd Gate" that when lifted would allow milk on one side of the bowl to flow into the other.
Z84Q TIL that in 1907 Kellogg’s promoted their cornflakes with something called the Wink Day campaign. Women we’re encouraged to “wink at your grocer and see what you get” , what they got was a free box of cereal.