MyFishFinder.com Just like iceshanty but warmer
I beleive that what you are referring to is the Bait Puck 2. "Big brother of the original Bait Puck. Keeps bait lively and fresh under all conditions. For winter use with wax worm, mousees, euro-larvae for summer use with leeches and crawlers. Insulated, easy open, crush proof and refrigerator safe. 5"wide x 2 3/8" deep." They say it will hold leaches so I don't see any reason you couldn't put a few minnows in it also. Check REED'S they have them. Good Luck and FISH ON.