There are 4 flours, mainly sorghum flour, and they have gluten-free options too. If you throw it away, animals and birds can eat it too. I have no idea if this is available in the US or not.
It started from a crowdfunding campaign on Ketto.org.
There is also an edible water bottle. Made from sodium alginate and calcium chloride. There is also a tutorial video on how to make these.