'Woongjin Coway' is feeling the 'SNSD effect', as they've just reported a 400% increase in sales since the girls began modeling for their brand! Representatives of Woongjin Coway revealed, "Ever since SNSD's CF for our ice water purifier first began airing last April, sales for our water purifiers rose 400% in the second quarter compared to the previous year.  Our recent releases have also been receiving the same effect, showing a higher rise in sales than ever before." SNSD signed on with the brand last March and have been promoting their 'Coway, Look After Mom' campaign.  They've strengthened the brand's image as the nation's #1 water purifier and even managed to bring in consumers in their 20's and 30's when the brand previously only catered to those in their 40's and 50's. Their influence doesn't stop there, as Woongjin Coway also recently held an online survey with 100 women (aged between 25 and 39) asking two questions: which water purifier brand do you think of first and which brand do you prefer? Woongjin Coway came out on top with 81% and 56% of the votes respectively.  Their marketing team explained, "SNSD's CF campaign has not only brought in a rise in sales, but also a new consumer base of those in their 20's and 30's.  We'll continue to use innovative marketing tactics with SNSD to continue our mark as the #1 water purifier brand." Source + Photos: Newsen via Nate