Review on Kooler Gel Ice Extender (White) - 3.5x3.5x12.25 by Jason Chaplain

I live in California where it gets very hot. My boat has a built in cooler, but it's not a $300 Yeti. Frozen milk jugs with water do not withstand the heat and constantly lift the lid for bait, drink, dinner and fish. All other Blue Ice containers are only 1 1/2 inches thick - Kooler Kubes measure 3.5 x 3.5 x 12.25 inches - weight equals power - they stay cold all the time. I want to buy their powdered product to make a 1 gallon size for a few day hikes!