Pixie Stix

What the hell is the singular form of "pixie stix"? Say I eat only one pixie stick. is that stick? stik? stic? stix?

I mean obvious if it was used in some random sexual manner, or if you're a porn star there's "Pixie Stixxx" (which I'm totally trademarking by the way so if you're a stripper, you owe me some licensing fees for that one).

But I haven't ever seen a good singular form for Pixie Stix and it's very frustrating.