Hi, we order them from Walmart when I order other things. We try to use each one at least twice. Our son first introduced us to highly-compressed cornstarch silverware back when he worked at Microsoft and they had them available for all the employees...they are surprisingly nice. He told us if you're really hungry, you can soak 'em and eat 'em. My feelings about that were, "ICK." But about using them, "Yaay!"
My DH is the chief cook and bottle-washer on camping trips, so I like to keep it easier for him when I can.
Going to check Radar1's links above...Walmart is easy; order over $35 and you get free shipping. Well, here in western WA state we do.
The key word at Walmart seems to be "eco friendly" followed by "cutlery" or "plates" or "bowls" to start your search. They seem to have gone to more wooden cutlery rather than cornstarch...I guess their stock changes over time.