Beautiful Silver Plated Etrog / Esrog Box Carry Case. Protective and beautiful. Ethrog (etrog) holders are used during Sukkot, the Festival of Booths, to store the etrog fruit, an oval shaped citron fruit. According to the Book of Leviticus, the etrog is one of the four fruits which Jews are required to bring into the sukkah (booth) on Sukkot. Etrog, according to rabbinic tradition, was considered to be representative of the “fruit of goodly trees,”. This ethrog box is silver plated and rich in fine and intricate detailing on all sides.