Had to do that once when I forgot to crack the lid when I drained some water out. HA!I chose the Orca. Made in the USA and tough here in the oilfield. We ran one all day in Mena Arkansas on a ride and dumped ice out the next day. The only problem is with all the bouncing you have to pry the lid up because the seal is so good. Not a bad problem for me.
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That's what I do for my lunch pail, not twenty though, HA!I keep a case of 20 oz water bottles frozen at all times. I use them for the ice in any cooler. I have found that for what ever reason they last much longer than getting cubes or blocks and they don't make everything wet inside the cooler and a good source of backup water.