The serum also happens to be one of the company's most popular product and a cult favourite. Estée Lauder has been tweaking the formula over the years, adding new breakthroughs such anti-oxidants (to prevent free-radical damage) and the Chronolux TechnologyTM that helps cells to maximize their repair cycle.  Minimizing past and current environmental damage brought on by the sun, polluted air, heat and cold, the lightweight formula works on any skin type. And to celebrate it's outstanding 30 years of service, Lauder is dressing up the bottle with some golden stripes for a limited time at Estée Lauder counters at The Bay, Sears and Holt Renfrew across Canada, 30ml for $63, 50ml for $94.