Blood Orange Cosmos

2 cups good vodka
1 1/2 cups blood orange juice
1 cup Cointreau
½ cup freshly squeezed lime juice (4 limes)
6 generous peels from a fresh blood orange

Combine the vodka, blood orange juice, Cointreau, and lime juice in a large pitcher. Fill a cocktail shaker half full with ice, pour the cocktail mixture in, and shake for a full 30 seconds. Pour into chilled martini glasses, rub the rim of each glass with a blood orange peel and add as a garnish. Serve immediately.