It depends on what you put in them. I hollowed out some wine corks & put cuttings of various plants of micro-stature. Some last for a couple years, some plants outgrow more quickly. They dry quickly & need to be braced if outside so they can't blow away.
plants to consider:
Sedum album, rubrutinctum, burrito
Jovibarba
Phedimus, various species
propagated leaf-babies from smaller-stature rosette plants like Echeveria, Sedeveria, Graptoveria
Crassula muscosa
Rhipsalis pilosa
Most definitely you can grow a succulent in there. My daughter is a miniature garden enthusiast and wants me to start a forum category for miniature container gardens.
My daughter's growing a succulent inside of a seashell, in a window ledge in one of our bathrooms. It receives moisture from when someone showers as well as an occasional light watering.
There's a variation of this cork mini-planter that involves using a glue gun to glue a magnet to the back of the cork planter so you can stick it to your fridge. Looks pretty cool.
The plant in that sea shell looks like an air plant. An air plant is a type of succulent that doesn't need to be in soil. Not all succulents are like that though...if you used an air plant in the cork that would be really cute!