Shake Shack customer hits 'no tip' at kiosk, then watches prices jump in viral video

A customer at Shake Shack selected "no tip" at a self-service kiosk and reported that the displayed price for milkshakes increased, according to a viral video posted online. The incident prompted discussion about tipping practices at quick-service restaurants. Shake Shack has not publicly confirmed whether pricing varies based on tipping selections at its kiosks.

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