We love our collection of 1930s Italian pencil boxes. Our most preferred are the two-color, double-sided pencils, commonly in red and blue, for teachers to correct homework. (“Errore lieve, segno rosso; errore grave, segno blu”: red for a minor infringement, blue for a serious offense.) When Princeton Architectural Press invited us to come up with a line of gift products, the two-tone pencils seemed perfect—thus the name. Steering clear of blue, our least favorite color, we opted for our signature red and black. No eraser, by the way. Who makes errori? Buy