Listerine has introduced "This Is Your Mouth," a documentary-style commercial narrated by actor Neil Patrick Harris (CBS's "How I Met Your Mother").
The commercial shows Listerine killing bacteria, describes its first formulation in 1879, and shows old advertisements.
In most states, each time the documentary is viewed at www.listerine.com/yourmouth a $1.00 donation will go to National Children's Oral Health Foundation: America's Toothfairy, up to $15,000.
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