Crest 3D White 2-Hour Express Whitestrips
We convinced tester Annie to hop on the fast track to whiter teeth with Crest's supercharged strips. Similar in style and application to their earlier incarnations, these are designed to stay on the teeth for a full two hours. The extra time means they're working extra hard: results are supposed to be visible immediately and can last up to three months.
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Source: Elizabeth Griffin/Hearst