So the story goes: a couple years ago, we went panning for gold in Northern California with friends-for-life Angie and Todd. They brought along some plastic vials to save some of the glittery silt. They had the brilliant idea to collect samples of soil from all of the cool places they travel to (and travel to cool places they do!). Being the nifty idea stealer that I am, I had to start my own collection. So far, I only have sand from the beach at Florida's Sanibel Island(pictured), but I'm planning to add to our collection when we go to Indiana in July, by snagging a bit of soil from the family farm.
Since we don't have friends with hospital lab connections I had to find my own vials. They were pretty cheap here. (I think mine are VC4)