I haven't been able to track down the person responsible for this table, but s/he is certainly clever. It looks easy to make your own. Just remove the center plank from the picnic table, then attach a gutter. Keep your wine cool during picnics by adding ice.
-via Nag on the Lake
UPDATE 4/1/12: Commenter Edward points out that this picnic table is from an issue of Dwell. The table is at the Medlock Ames winery. Thanks, Edward!