You Know The Voice: Michael Bell shills for Cool Whip (early 1970's)

 Cool Whip, introduced in 1966 by Birds Eye, then a subsidiary of General Foods (now Kraft-Heinz), has attracted celebrity endorsers for years. The longest running series featured the Tucker Inn, with Marge Redmond (ex-The Flying Nun) as Sara Tucker. That series began around 1974 and ran until the early 80's.

Before that, we have this bit with Michael Bell (ex-The Bold Ones: The Protectors, etc.) and Rick Hurst, before he landed his first series gig with 1975's On The Rocks, as a pair of bachelors distracted by a fellow party guest and her Cool Whip topped dessert.....

I can't be 100% sure, but that might also be Michael, who would do a zillion voiceovers for Parkay, Zales Jewelers, and Red Lobster, among others, doing the closing voice-over. How he never landed a leading role in a series himself, I'll never know.