Uncountable nouns have no plural. The verb form is singular and we use some.
- There is some milk in the fridge.
- Is there any sugar?
- How much water is there?
- There is a bottle of milk in the fridge./ There isn't any milk./Is there any milk?
- There are some doughnuts in the cupboard./ There aren't any doughnuts/Are there any..?
- Be careful: CAN I HAVE SOME MILK? PRACTICE