I used
THIS one from Petco, with the lid upright for my Scupper Pro. Works great.
I was also out there this morning - left the beach at 5:15, 200 yards off the beach a grey whale and calf surfaced 20 feet in front of me and proceeded to circle me right up close, then they headed north in 15 feet of water. Dolphin jumping everywhere, and the bait and birds going crazy. Unfortunately I didn't meter any target fish in the bait balls, but there is enough bait out there to feed every WSB and Yellowtail on the West Coast!