I use the fish oil caps, and had been using the Flax oil. I just purchased a bag of ground flax seeds and have been adding it to my shakes. I have to take my mix of protein/oatmeal/creatine/flax and put it in a bag to take to work. I was unable to do this with the oil. The ground seeds make it possible.
Check out Invalid Link Removed for bulk purchases of flax, oatmeal, and other grains and organic foods. They sell the brand at my local grocery store. Prices are very reasonable.