You drink 2-3 litres of fruit juice and/or rice milk each day??
If so, you need to seriously consider cutting back on that:
A litre of rice milk is roughly 470 KCal.
A litre of fruit juice is, depending on the fruit, is around the 560 KCal mark and typically a lot more sugar than the rice milk.
That's, at a minimum, 940 (2L of rice milk) extra calories you're ingesting during the day and at most, 1680 (3L of fruit juice). Even if you eat like a small bird, the sugars in the fruit juice are not good for you in the long run at that amount.