For my money, Almond's unsweetened flavour profile wins hands down. It has 1/2 the calories of "unsweetened" Silk. Here are some data for those interested in the comparison. The issue is that most people don't understand what they are drinking.

Almond milk has 60 cal per 12 oz,

Vanilla Silk has 150, "Unsweetened" silk has 120.

Coca Cola has ~145

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http://caloriecount.about.com/calories-blue-diamond-almond-b...

http://caloriecount.about.com/calories-silk-soymilk-vanilla-...

http://caloriecount.about.com/calories-silk-soymilk-unsweete...

http://caloriecount.about.com/calories-coca-cola-classic-i98...