I have a feeling that is what I am going to do. I am not really looking for colder. I’m looking for last 4 hours in my bag and easy to refreeze. Also use in my hard cooler for a day. Not really any need for using to freeze raw meat, which is pretty cool. Lasting in a hard cooler for 3-4 days is nice too. Frozen bottles would work, but they will crack after reusing a few times. Frozen bottles won’t have the bomb squad called if you happen to leave at the launch either... I wonder if the Lowe’s surveillance footage of me buying my supplies is at the FBI office right now?