As ubiquitous as Popsicle seems to be these days, it's kind of hard to think of a time when they had to advertise... but advertise they did, and in the pages of Fawcett Comics, to boot! As with other advertisers, they liked to use a comics format for their ads, or at least the top half of their ads. Here's some ads featuring the relatively short-lived mascot Popsicle Pete!
As you can see, the bottom half of the ads were used to promote mail-in offers.
Notice that Popsicle Pete's gained himself a uniform!
Here, Popsicle Pete is being replaced with the Popsicle Twins... also referred to as the Popsicle Kids!
Major Mars was another mascot used, although this is the only ad that I have featuring him!
Other ads were entirely based on promoting the idea where you could save the bags from Popsicles in order to redeem them for prizes, without the comics portion:
Next time: PSAs, mostly supporting the war effort!