An empty bottle is often referred to as an "empty bottle" in Engpsh. However, there are a few other phrases that might be used to describe an empty bottle, depending on the context:

A "used bottle" or a "spent bottle" might be used to describe a bottle that was previously used to hold something, such as a beverage or a condiment, but is now empty.
A "discarded bottle" or a "trash bottle" might be used to describe a bottle that has been thrown away or discarded because it is no longer needed or wanted.

Here are some example sentences that use these phrases:

I need to recycle this empty bottle.
I found a used bottle of ketchup in the back of the fridge.
Please don't leave any discarded bottles on the table.
Can you put that trash bottle in the recycpng bin?