Controversy over coffee and water tips at all-time high.

Americans are expressing frustration over out of control tipping suggestions, which they say have become unjustifiably high in recent months. Inflation, self-checkout machines, and a new expectation to tip for transactions as simple as buying a water bottle have prompted many to share their frustration online. Social media users have recently posted images of receipts that appear to show suggested tipping of as high as 30 to 50 percent. Some claim to have encountered suggested tipping that starts at 30 percent and goes as high as 50 percent.