The Pistachiopener

Even if you were to ignore the fact that a pistachio that doesn’t open as it’s roasted is immature and doesn’t taste as good as a mature pistachio, the PistachiOpener solves a problem that doesn’t really exist. If you absolutely must eat the few nuts whose shells haven’t fully opened, you can take a half-shell from one you’ve already eaten and use it to pry the closed one open.