"But mustn't you tire of looking for at and illustrations of glasses of orange juice, Inflammammal?"  No, but if I did:

Inflammammal spends a lot of time thinking "Is this item too racist to post?" about certain images, regardless of how nicely designed they are.  (One encounters this problem a great deal with Native Americans and certain other indigenous peoples on fruit and can labels, as there are just so many.)  Typically I just skip the post, erring on the side of caution.  In this case, I am posting despite its exoticization of the Hawaiian womanfolk and their shirtlessness.  It's right on the line, but look at those pineapple chunks!

No theme to this, just some can labels I enjoy.  "Below U.S. Standard" does not applies to the first's contents.

Everything's more attractive and affecting with a lighthouse on it!

Wish my scanner could better pick up the shiny gold-foil details on this one.  Still Apollonian without it.

Old matchboxes covers/labels have always been a category in which I've only been interested in the piece if I *really* loved the subject matter.  With that, I give you, coming in at a mere 1 3/8 by 2 inches,

And, at an expansive 2 7/8 by 4 3/8 inches,

Inflammammal sees any number of ways this 1951 ad could have been improved, but it's still tasty enough to feature.

One sometimes see ads advertising the nonavailability in a product, during the WWII requisitioning and rationing of (formerly) consumer goods.  All else aside, it's a fascinating advertising phenomemenon: You can't have these.  Sure be nice when you can, though, sometime in the totally indefinite future, huh?"  From 1942:

My final category of postcard interest is a mystery to me - factories and (manmade) plants.  Doesn't fit well with the rest of my niches, but look, it's so neat somehow:

All in the geometry and composition I suppose.  Bu unnaturally bright night scenes remain my #1: