Okay, so I didn't even know there were other weirdos like me who collect these mugs! I found a whole web site dedicated to it, and now I'm embarrassed to admit that I didn't even realize they would stack neatly like this!

At least that is a useful thing to collect!

They look ok stacked, but not that artsy or interesting!

You definitely aren't alone! Pinterest has lots of pictures of storage for Starbuck's mugs. Storage example

I have a collection of handmade pottery mugs in one of my glass fronted cabinets. They're not displayed in any particular way, except the ones I like the most are in the front. Easier to grab for my morning cup of joe.

Cups always look best on hooks IMHO.

We have a bunch of mugs that were gifts or collected over the years. We keep them in what we call "the ugly mug drawer" ...because some of them are ugly, and, as a hodge podge collection, they most definitely are. : )

https://www.amazon.com/TIERED-STEPPED-EXPANDING-PANTRY-ORGANIZER/dp/B0783MYZSW

The link is to a large version of the spice rack steps used for cans. I'm not sure if it would work for your mugs, but might be worth a look.

Seems like the mugs would be perfect for between-the-studs shelving, with glass door to keep them from getting dusty.

Imagine all the ways you can arrange them! Geographically, alphabetically, time of purchase, color-blocking, theme, ooh, fun!

Of the Pinterest images, the ones with rails and hooks look the easiest to hold an expanding collection. When you fill up the last rail and then pick up a new mug on your travels, just add a rail!

Hmm, maybe I could stack them with something between them, like a thin slab of...marble? Wood? I guess I’ll need to play with them a bit and see.

They‘re definitely going in the cabinet. I don’t have enough extra wall space to devote a display cabinet nor do I want to give them that much importance! I thought about hooks too like under, at the back of, the shelves in the cabinet but I hate the idea of putting hooks in brand new cabinetry.

I had to Google. :D A thin slab of marble would be delicate, yet heavy. Not a fan of hooks. I like your idea of tiered shelf for them. How many mugs are we talking about? A cabinet would be deep enough to go three high, if enough height. Or only two high, with more width. You could have one made by an etsy shop owner, with specific depth and length.

I think about 20 mugs. And counting ;-)

My contractor is great — I should brainstorm with him while he’s here. I’m sure he’d make something for me. He made us an adorable “dog gate” for our porch with a cut-out in the shape of a paw as a handle. (Without us even asking.)