Using the Bottles
This series of bottles will give you a retail/wholesale product example to use to illustrate supply, pricing, or volume comparisons and concepts. There are six different levels of liquids, two bottle types, two bottle colors, and two label sizes.
You should be aware that the bottles are developed in layers. The bottle has a front and back, the liquid is another layer, and the cap is a group on another layer. The order from back to front is back of bottle, liquid group, front of bottle, cap and label on the front layer. See the example below.
Customizing the Bottles
If you want to change the size/shape, be sure to group the bottle(s) and resize the entire group. Once resized, ungroup and proceed with other customizations.
Choose colors that help make the bottles look real. Alternatively, you can color code the bottles to add another level of information to the slide if you wish.
PowerPoint 2007 options
None of the enhanced PowerPoint 2007 formatting options will add to the realism of the bottles except, perhaps, the drop shadow.
Don't use 3D with these frameworks. The 3D feature makes the objects look less realistic.
Do not use shadows in pre-PowerPoint 2007 versions.
Gradients, patterns, and pictures
If you use gradients, make sure that the gradient variation is realistic looking. You're not applying gradient as a design element, you're applying it to make a drawn object look more realistic.
Objects like this shouldn't be revealed in sections. The liquid may be able to be animated as a wipe from the bottom, but it doesn't look that realistic. If you must use this type of animation, make it very fast so the details are obscured by the speed. Simple reveals of whole bottles and fills is probably best.