I bought two 5 gallon buckets of Premium (Traveller) tractor hydraulic fluid recently. I was topping off the hydraulic system reservoir on a tractor this week from one of the newly opened buckets. I noticed some milky looking fluid going through the bucket pump clear tubing. Turns out that the bucket had 1-2 inches of water at the bottom of the bucket. The bucket was still factory sealed when I opened it. I suctioned the bad fluid out of the reservoir and took the bucket and a clear cup full of white fluid water emulsion to show the T S C store manager. I let the manager know that I store my fluid inside, so it was unlikely that water got into the bucket after I purchased it. She said that they store pallets of tractor hydraulic fluid outside. So that is a good explanation of how water leaked in. They gladly refunded my purchase price, but I let them know that I will not be buying any further hydraulic fluid from them until they start storing it inside. Just a word to the wise, make sure that your supplier does not store 5 gallon buckets of motor oil, tractor hydraulic fluid, gear oil, etc outside.