I like almond milk, it's low carb and only 35 calories for a 250ml glass, it's a good source of vitamin C, makes nice fruit smoothies, (is nice in tea - not so good in coffee in my opinion,)is very low sugar content 0.4g and low fat at 1.2gm per 100mls. Definitely worth trying if your looking to cut calories... personally I love the taste too. x
Oh and most have added calcium, so it's a good source of calcium too but make sure you go for the UNSWEETENED one. x