Says creator Katie Nelson, a bartender at the Columbia Room in Washington, D.C., "The Back and Forth is an example of a cocktail that started out with us having one thing in mind and, after tasting and tasting, became something entirely different. We began with the idea of doing a sparkling version of an El Presidente (rum, orange curaçao, vermouth, grenadine) but that didn't work for us, so we changed it. We arrived at a cocktail that is floral and lightly sweet with an herbaceous finish. The bubbles lift the aromatics and provide great acidity." Gin, honey, sparkling rosé, and a lavender wand for garnish? Sure sounds like spring in a glass.