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As someone else said, recovering alcoholics, but also they market towards sustainability. Infinitely recyclable aluminum instead of single use bottles and all that. I’m still just gonna drink from the tap most of the time, but I’ll pick one up on a road trip or if I’m going on a picnic or something
In universe I want to guess they added pressure to the back side of the system to balance out the water vs air pressure since it’s part of the training system. That said, it was probably just movie magic bs.