I needed a small cookie plate. So maybe PLA isn't FDA-approved but frankly I think most people would probably eat a cookie that was sitting on the table with no plate so a PLA plate is probably okay. Just in case, however, here is a plate the minimizes cookie/PLA contact, because of the waviness of the plate - based off the cosine curve. This was made in Tinkercad using Brandon Cole's wonderful community shape script "Surface", with z=4cos(.2x).

Printed on a Replicator 2 with MakerWare low/.3mm and a raft to keep things steady. With these settings the print takes about an hour and 20 minutes and the majority of the plate is just one layer, with the plate printed on its side; no supports needed at all. http://makerhome.blogspot.com

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