How did the Stanley tumbler suddenly go viral?

Tumblers, water bottles, beverage containers or whatever else people want to call them have become even more popular over the last several years.

Why are people going crazy over these? Besides the color : r/Flipping

Careful of viral Stanley Tumbler Facebook sale: Major deal is not

The Stanley Cup Hype Is Real

How a 40-ounce cup turned Stanley into a $750 million a year business

Folks were apparently going nuts for this thing this year? : r/Target

How did the Stanley tumbler suddenly go viral?

Why are the 100 year old #StanleyCups suddenly going #viral

Gen Z's obsession with the Stanley Tumbler is crashing, trend

Stanley: When Viral Luck Strikes, Swift Action Speaks Louder Than