I followed this link to check out SeaSafe. My wife got stung by jellyfish in Hawaii and wan't happy. Last time we were in Cancun, we were eaten up by invisible jellyfish so I'm glad to see something like this. It's $9.95 a bottle of 4 oz. If it keeps us from getting pica pica it is well worth it!
Here is a cost saving hint. When purchasing, fill out your address, then hit "back". It will offer you free shipping ($5.95) if you continue with the order. To put it in perspective, that is almost two free Belikins! http://www.safesea.net/?CFID=3770981&CFTOKEN=12443585