I take a few different types of liquid protein.
Some of the stuff out there is junk though.
I stick to the good stuff.
Dymatize Elite Liquid Protein(45grams)
Ingredients: Pure filtered deionized water, Elite Liquid Protein Blend ((biopeptide, whey protein isolate and casein protein isolate), l-glutamine), citric acid and/or milk acid, natural and artificial flavors, caramel color, sucralose, blue #1, titanium dioxide.
I am now also trying out the new...
Inner Armor Nitro-PEAK 50x(50grams)
Whey Protein Isolate And Joint Restoration Matrix [Containing Pro-Connect™ (Connective Tissue And Cartliage Repair Matrix (Low Molecular Weight Hydrolyzed Collagen Isolate)) And Whey Protein Isolate With Naturally Occurring Critical Bioactive Compounds Including Di, Tri And Oligo Peptides, Beta-Lactoglobulin, Alpha-Lactalbumin, Serum Albumin And Immunoglobulins].
Hydrophilic Cellular Hydration Complex (Containing Positively Charged Carbon Filtered Water And Glycerol With Naturally Occurring Polymeric Compounds).
Intracellular And Extracellular Fluid Balance And ATP Precursor Complex [Containing Phosphorous (As Phosphoric Acid), Potassium (As Potassium Sorbate) And Sodium (As Sodium Benzoate)].
I don't like that it has Collagen, but the flavor is pretty good and I got it pretty cheap.
I stick with Blue Hawaiian flavors.