Collins
Add gin, syrup, egg white, lemon juice, lime juice, and orange blossom water to a cocktail shaker and shake until foamy, 30-45 seconds. Add cream to shaker and fill with ice. Shake until combined and well chilled. Pour 3 ounces of seltzer into a collins glass. Strain cocktail into glass and let rest for 30 seconds to 2 minutes. Slowly pour remaining 2 ounces of seltzer into glass. Foam may rise above the rim of the glass.