One of my favorite things to do at the end of the gardening season is to purchase things for the garden that have gone on clearance. One of those items I always buy on clearance, with plans to store and use in the garden next year, are plant labels. Maybe I'm just really cheap but the prices for these pieces of plastic seem astronomical. Although, by the time the next gardening season arrives I can't remember where I stored those plant labels and I end up making my own plant and seedling markers. Perhaps gardeners who buy plant markers in the spring have the right idea, but I like to make plant labels for the garden from recycled items.
You can also make plant labels from old window blinds. While wearing protective gear; split open an aluminum can with a pair of tin snips and cut it up like the plastic milk jug above to make really sturdy plant labels. Sand the edges down to smoothen out the rough edges to make them safe to handle.