[Staples] Staples: Visine Red Eye Drops - $1.97
http://www.staples.ca/en/Visine-Red-Eye ... 99_1_20001 $1.97
http://www.staples.ca/en/Visine-Dry-Eye ... 99_1_20001 $1.97
One is good for workplace and another is for contact lenses. Both are probably good for hiding what you'd get from smoking some stuff that also would give pink/red eyes. At $2 for 15mL you can't go wrong either way.