That's because Pepsodent's gentle oral detergent cleans not just the surfaces of your teeth, but around and between them. Even where your brush can't reach.
10 seconds sound clip from the The Day the Earth Stood Still (1954) classic radio play.
You can hear this line at 00:53:08 in the radio play.
Quote context
[...]
- In a moment, our stars will return.
- Pepsodent's new flavor! Pepsodent's new flavor! And a clean-mouth taste for hours!
- Yes, the big news is Pepsodent has a brand-new wonderful flavor.
- Grown-ups prefer it, but kids... Well, kids go crazy for it. And that's not all.
- Your own personal proof of this is Pepsodent's clean-mouth taste for hours.
- So try new Pepsodent White, or if you prefer chlorophyll, Pepsodent Chlorophyll. You'll like.
- And now, here's Mr. Cummings with our stars.
- And here they are, after two out-of-this-world performances, Michael Rennie and Jean Peters.
[...]