PSA: that $12 airport sandwich isn't the real budget killer, it's the $4 water
I started writing down every single thing I buy on trips, and the small stuff adds up way faster than people think. Last month I did a long weekend in Chicago and the big costs (flight, hostel) were fine, but I logged 11 bottled waters over 4 days at $3 to $4 each. That is almost 45 bucks gone on something I could have just refilled at the hostel sink for free. Everyone talks about packing snacks to skip the expensive meals, but nobody mentions the drink habit. I bring a collapsible bottle now and it fits in my day bag no problem. Has anyone else tracked their trip this closely, and what dumb little cost surprised you the most?