Both the town I live in now and the one I grew up in used to have Purity grocery stores. The buildings had rounded (arched?) roof lines, which gave them their own very distinct look. I was tickled to find this vintage advertising needle book here in the house - in an old sewing basket that belonged to my mother-in-law.
Then, just recently, I found an old ad, too! It was in among some old magazines in a box up high in the closet. You can see the store shape again here on the letterhead of the store circular from May 29th, 1946:
I like looking at the prices from 65 years ago:
And just in case you needed some recipes, here's one for Strawberry Shortcake, along with a few others:
Save me a serving of that shortcake, will ya?
(P.S. I found a neat website Groceteria.com, that shows some pictures of buildings that used to house Purity Stores, some of which now house other businesses. It's interesting to see, if you want to go have a look.)