Realistic Water Bottles in blender Cycles,
1) Handy Clear Plastic Material
2) Editable Layered *.PSD file with nutrition information and standard environmental logos
3)Seamless screw texture for bump mapping of the lip of the bottle, so you get a realistic looking screw top, without all the added unnecessary geometry, so your renders don't slow down.
Looks great when rendered in low poly mode, looks great if you render it with sub-surf modifier added.