I used to have a rock collection like this when I was little.
I remember there was a rock inside that looked exactly like a chunk of potato salad.
from the home of Kristen Stocks via Design Sponge

I celebrated my 26th birthday while I was in Hawaii. Although the day itself was one of the worst days of my life (long story, but a woman forgot she tied her dog to the back of her truck and took off dragging it to death. Ben and I witness the whole thing, but we're unable to stop her until it was too late....absolutely horrible. If you have a dog PLEASE don't ever tie it to your car. Apparently this happens a lot [Sorry for the complete downer....]) I did get a pretty awesome gift from my wonderful husband. 
I'm loving these kitchen and dining wares from New House Textiles. A company based in England & Sweden that is family owned. The collection is based on 1950s Swedish designs mixed with a little retro. I really want the fish canister!