Many manufacturers use small jugs that have narrow mouth openings, which can make scooping product difficult. True Nutrition offers large 110mm and 120mm necks for easy scooping! Available in three basic sizes:55ozHolds up to 1lb of lighter materials like Whey Protein Concentrate, and 2lbs of denser materials like Dextrose.1 GallonHolds up to 3lbs of lighter materials like Whey Protein Concentrate, and 5lbs of denser materials like Dextrose.2 GallonHolds up to 6lbs of lighter materials like Whey Protein Concentrate, and 10lbs of denser materials like Dextrose.