CarnationMalted Milk, Chocolate, 13-Ounce Jars (Pack of 3)

Q: how many calories is in it?

3 Tbsp which makes 8oz. is 90 Calories... It is soooo delicious !!!

Q: would this taste good mixed with Water instead of Milk?

This product is normally mixed with milk or milk alternatives but can be used to make delicious milkshakes, smoothies and other specialty drinks. It is formulated for use with milk. It can be mixed with water, however, we cannot guarantee it's flavor would be up to our high standards. Luz - Nestlé Consumer Engagement Center

Q: Can this spoil? Mine taste funny after just a month

It's made with real malted barley, so like any grain product it can spoil, especially if any moisture gets in it. Under normal conditions, it should last several months if stored in a cool, dry location.