Idea of Bottle of Water Icon
This is an image of a cylindrical plastic bottle. While not a perfect cylinder, the top and bottoms of this bottle are slightly larger in diameter than the middle of it where the label is. At the top of this bottle is a smaller, low profile cylinder for the bottle cap.
This page shows the different variations of the Bottle of Water from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free.