My favorite fodder for the nuka pot, at the moment, is the ‘Diva’ hybrid cucumber. Sleek, smooth, seedless, thin-skinned, and absolutely never bitter, this creation of breeders at Johnny’s Select Seeds was a 2002 All-American winner. At the recommended harvest length of 5 inches, with an approximate diameter of 3/4 inch, this tasty cuke is perfect for a 1-gallon nuka pot. I bury two or three of them at a time, and take them out to eat the next day. See the nuka-pickled ‘Diva’ cucumbers here.
UPDATE 2022: Thankfully, ‘Diva’ is still available from numerous seed companies.