SHAMROCK SCIENTIFIC "DATE OPENED" ADVISORY LABEL, 1.5 X 0.75 INCH, SOLD AS 1/ROLL SHAMROCK UPCR-3012Shamrock Scientific "Date Opened" Advisory Label, 1. 5 X 0. 75 Inch, Sold As 1 Roll Shamrock Upcr 3012 Since Many Items' Perishability Depend On When They'Re Opened, Use These Labels To Record When You Opened Them. Labels Have Two Blanks: One For Date Opened And Another For Expiration Date. Roll Holds 500 Black Text On Blue Background Labels. Label, Expiration Date Opened (500 Rl) Pre Printed Write On Label Auxiliary Label Blue Date Opened _____ Exp.