Have taken a quick look at your bottle.
For debossing or embossing you'd be best to first turn your bottle into a solid model and shell at a later date. (i would recommend to use the thicken tool on the surfaces tab)
You will also not be able to use the wrap function with a single line sketch, you will need a closed contour.
Are you intending this wave to go all the way around the model? and what thickness/depth are you intending this wave to be?
Adam,.. if you do a search on the web (link attached)... there are some examples which may help,.. this one looks good.. (link)
I have a feeling you're asking us to do your homework for you. There are many ways to get those waves on the bottle. I would probably not use surfaces for this. It's simple enough to do solids. Debossing might work, but you can't do it straight from sketches. If you can wrap something on here to go all the way around, you're better than I am. Personally, I would project curves onto the bottle, then sweep grooves in it. If the grooves aren't symmetrical front to back, then do spline on surface, or split the bottle face in half and do front and back split lines or projected sketch. With the bottle split you have a better chance of getting wrapping to work, but you have to do it once for front and once for back.
I hope your professor is asking you for a different thickness for the neck and the rest of the bottle. Hopefully also asking you to find the volume, and put some feature on the bottom.