Dromedary bags--tough as nails, malleable to fit many places. Multiple sizes--10 L is fine + a couple smaller ones to fit smaller places. In the Everglades, it is recommended 1 gal/day/person. You can get by with a bit less, say 3/4 gal/day, but that is risky because you may accidentally leave a bag open and lose a gal or 2. One absolutely beautiful thing about Dromedary bags is that raccoons DO NOT bother them. Throw them one on the beach, leave one on your boat, raccoons ignore them. Leave ANY plastic bottle with liquid on your boat and watch how long it lasts with raccoons around.
I strongly recommend the original, more expensive, Dromedary bags. The cheaper Dromedary Lite bags are not nearly so tough. A Dromedary bag can last you 10 yrs or more, in an ocean environment.Dromedary bags on Amazon.http://www.amazon.com/gp/product/B000FIU2TG?keywords=dromedary%20bags&qid=1449654673&ref_=sr_1_1&s=sporting-goods&sr=1-1
It is also good to have at least one of the Dromedary spigot caps: http://www.amazon.com/MSR-Spigot-Cap/dp/B00KCQ2SJI/ref=pd_sim_468_2?ie=UTF8&dpID=51Jjsk0KJ2L&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1A46HT5CFQ8PQ6FW19MC
Finally, a 2 or 4 L bag is useful to use around the camping dinner table because it is easier to handle. It can be refilled as needed.
Just a comment about raccoons--they used to be an absolute scourge on Everglades beaches. They were a total pest. Their numbers have greatly diminished in recent years. Could it be due to various non-indigenous snakes (Burmese pythons, etc) which people have released into the Everglades when they became dangerous to keep at home? I don't know, but it is absolutely wrong to turn a non-indigenous snake loose in the Everglades.