Try chia seeds in your water! Just like the seeds that grow the famous ch ch ch chia pet, they are a food that is rich in omega-3 fatty acids.
According to the USDA, a one ounce (28 gram) serving of chia seeds contains 9 grams of fat, 5 milligrams of sodium, 11 grams of dietary fiber and 4 grams of protein.They have no taste, but they do tend to gel up a little so I sometimes have to shake the water bottle before I drink, just to break it up. I just dump a handful in some juice or water and I'm good to go.
A teaspoon of concentrated OJ added to that takes the chia taste edge off too.