Four days after the arrival of a shipment of office supplies from Staples, P&K Insurance office manager Patty Hildebrandt, 41, remains ambivalent about Sharpie's new 'Twin-Tip' double-ended permanent marker. 'Putting a fine tip and a broad tip on the same pen is very convenient, not to mention cost-effective,' Hildebrandt said Tuesday. 'Still, neither of the twin tips really works as well as a single-ended marker, probably because they're sharing the same ink.' Hildebrandt recently took a strong stand against 3M's accordion-style Post-It notes, calling them 'an abomination.' 