I agree never check critical medical equipment, also I have a question, my dad's machine (I think it's a CPAP machine, I know his machine is for sleep apnea) needs Distilled Water, any suggestions on how to get this? We are not renting a car, so somewhere onsite will be needed, I know I could always order from one of the grocery services that deliver, but it seems like such a waste for one bottle of distilled water when most of them charge $10+ for delivery.