I cut up orange and green one gallon pots and use them as markers. I step on them all the time and they bounce right back up. I get 18 labels per pot and I use a paint pen to write the names. You can easily remove the names from the tags with a little rubbing alcohol on a rag.
(Planted in 2013 and the tag hasn't faded)
(I don't currently have a photo a photo of an older orange tag, but this one was tagged in Summer)