At the same time, the brand's popularity may have peaked and is "on the way out," teens said in the firm's annual survey. While Stanley's multi-colored insulated cups still have considerable caché, upper-income teens told Piper Sander that the products could soon see the same fate as skinny jeans. Upper-income male teens surveyed ranked Stanley cups as their fifth-most fashion trend on the way out. Keith told Business Insider the survey's fashion trend question is open-ended, meaning that respondents are not prompted by a list of options. "They really kind of struck gold with these larger, thick cups, with the handle and a straw," Keith told BI.

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Persons: Piper Sandler, Stanley, —, Piper Sander, Peter Keith, Alexia Morgan, Keith, doesn't, weren't, Piper Sandler's, Morgan, hasn't, Dominick Organizations: Service, CNBC, PMI