Conversation so far:
how did m and m get its name
M&Ms were named after the surnames of the company’s founders: Forrest Mars and William Murrie.
how did  snickers get their name
The Mars family named the candy bar Snickers in memory of its favorite race horse. This bar was introduced in 1930.
How popular is the M & M brand
M&Ms are the most popular candy with revenues of $406.7 million and 417.7 million in unit sales. They have been around since 1941.
what is the second most popular candy brand after M&M
Reese's Peanut Butter cups are the second most popular candy with revenues of $398.9 million and 366.2 million in unit sales.

Question: when was the second most popular first sold
Self-contained rewrite: when was reese's peanut butter cups first sold