
Omega 3 Innovations sells liquid omega 3 rather than capsules, and ships it cold. Both choices come down to freshness. Fish oil oxidizes with time, heat and air, and oxidation is what produces the taste and the repeat that put people off supplements in the first place.
Cold shipping is included on these items, which is worth knowing before you line the price up against a shelf stable capsule.
Vials or bottle is mostly a question of habit. A vial is one serving, sealed until you open it, and it travels. The bottle is less packaging and less cost per serving, and it asks you to keep it cold and finish it in reasonable time.
Omega 3 supplements are formulated with EPA and DHA, the two long chain fatty acids fish oil is bought for, and the amount per serving is printed on the label. That number is the one to compare across brands, since serving sizes vary and a bigger bottle is not automatically more omega 3. Supplements can interact with other things people take, so anyone on medication, pregnant, or under care for a health condition should talk to their doctor before adding one.