Little Dinosaurs Authentics with brand names?

I have since my childhood (early 90's) 5 of those 6 little dinos (missing the stegosaurus)
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From all the pictures I see of them, their is a few differences in colors but mine are also stamped "Volvic" or "P&G" on them and I never saw that in pics from other people  
Were their also given as freebies by the brands (Volvic as the water bottles in France, I don't know what P&G is) or something back then?

I was also not aware of these versions but surely they were sold as premium figures.
As you pointed, Volvic is a French mineral water brand and P&G is probably Procter & Gamble which is not French but is headquartered in Paris with plants in Amiens and Blois. Likely those were premium figures sold with their detergents. In Portugal many detergents offered this kind of figures and I know it was the same in France.

Thanks for the informations!

Here are my figures:
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Very nice, the detergent Tide belongs to Procter & Gamble. I have no idea if these figures were offered with Tide products but it was usual to find premium figures with detergents, OMO figures are relatively well-known, especially the French series. However, OMO is a Unilever brand.