Saying 72 hours makes three days sound like a long time. Apart from potable water I can easily survive for three days on what is in my house already. Instead of water I’ll just have to drink the wine, beer, and cider that I have in the cellar I suppose. What sort of emergency is likely to occur that is going to be mitigated by having a crate full of Dollar Store stuff?
In case it’s not obvious: I’m writing this from the other side of the pond, specifically Norway.