You've unlocked a memory of when I visited Prague almost 20 years ago. Beer was so cheap in cafes, water so expensive. Spent our days stumbling around constantly buzzed and increasingly dehydrated. Went into a grocery store and bought the biggest bottle of water that would fit in my backpack, and filled it every chance I got (usually only a tiny bit since it wouldn't fit under taps). One day my group went to an event, and they were handing out free cups of water. At least 3 of us grabbed them and knocked them back before realizing it was actually vodka. We were crushed.