Diet or regular Snapple? If it is the regular you have sugar on the inside of the iPod and it would need to be opened and cleaned out.
Not a good idea to turn on an iPod while it is wet. If it was diet Snapple set the iPod in a cool, dry place for at least 7 days and let it completely dry. After this connect it to power (a wall charger works best) and let it charge for at least 30 minutes. While it is still connected to power Reset it. This may take several tries. If it revives, let it fully charge and Restore it again.
If it was regular Snapple, or this doesn't work, you can send it to a 3rd party repair site, such as
http://www.iresq.com to have it repaired. You can use Google to find more repair sites.