This video from Edwin Sarkissian tests the 'bulletproof' claim of Yeti Rambler 20oz Tumblers. Using a Glock 19 with 9mm rounds and a Glock 23 with .40 S&W rounds, Sarkissian demonstrates that while the cups are durable, they are not bulletproof, with bullets penetrating multiple cups. The video showcases a systematic approach to testing product claims with firearms.
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