RapidLash is a natural lash growth enhancer that can also be used on to stimulate growth on brows. Courtesy photo.

If you're tired of friends clogging up your Facebook newsfeed with quiz and game results (someone please explain to us the point of 'farming' vegetables online?), we've discovered a more fun -- not to mention productive -- way of playing during your lunch hour.

This week, RapidLash will donate $1 per free 'wink' you send on their flirtatious new Facebook application to cancer charities, for a total donation of up to $5,000.

The lash and eyebrow growth product is an all-natural, prescription-free alternative to the popular drug Latisse, and is made of a paraben-free formula of vitamins and conditioners that is applied to the lash line nightly.

And we hear the wink action continues at Match.com, where users can flirt with a potential love interest by sending a sexy RapidLash wink.

"The first ever Wink Week is just another way to engage our passionate and devoted fans, encouraging them to bat their beautiful, lush lashes, and simultaneously help a very worthy cause," says Robert Trow, CEO of RocaSuba.

Our own experience with RapidLash is a rave; the liquid liner-like tube is a breeze to apply, and stimulates lash growth without the risk of Latisse's side effects. A tube is also a fraction of the cost at $49.95 in the drugstore, though a temporary sale in honor of Wink Week will see bottles priced at $39.99 for a few days only at Drugstore.com.

We wanted to get in on the feathery fun, so StyleList has arranged for ten readers to try a bottle of the lash and brow growth product entirely free!

To enter the giveaway:
-Leave a confirmed comment below sharing your favorite lash product.
-The comment must be left by June 14, 2010.
-You may enter only once.
-Ten winners will be selected in a random drawing.
-Ten winner will each receive a RapidLash EyeLash Enhancing Serum, valued at $49.95.
-Open to legal residents of the 50 United States, the District of Columbia and Canada (excluding Quebec) who are 18 and older.

Click here for complete Official Rules.