In this March 4, 2011 photo, a Check Valve Adapter is seen with a bottle of maple syrup in East Montpelier, Vt. The device was developed by maple researchers at the University of Vermont as a means of... more 
In this March 4, 2011 photo, a Check Valve Adapter is seen with a bottle of maple syrup in East Montpelier, Vt. The device was developed by maple researchers at the University of Vermont as a means of extending the six-week sugaring season. less 
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Associated Press | Photo By Toby Talbot
Sun, Mar 6, 2011 3:28 PM EST