I saw this idea on Pinterest (of course). To make these little glass toadstools or mushrooms, just use a cheap glass vase and a cheap glass bowl. Turn the bowl upside down over the vase, glue with Super Glue, and you're done.
They add a nice little sparkle to your flowers or landscaping. Mine will eventually go into a flower bed, but for now it's on the deck.
Here's a closer look. Any pattern on the glass works fine. I bought mine for $1 at the What Cheer Flea Market here in Iowa this spring.