I used to have to pay for the glass mulch, but Austin has been recycling it and now offers it for free. You just back your truck up and take as much as you want. It's mixed with sand, so I wash it before I use it. It smells a little like stale beer too until it's washed! 'Like the sparkle on the paths and pots, and the slugs and snails don't seems to care for it...