There’s a Citi (formerly known as Citibank) commercial on television right now in which people are talking about ways to save money, like biking to work. One woman shares, “[I] take hotel shampoo bottles when I travel. Haven’t paid for that stuff in years!”

Now, here’s where I’m concerned: Those bottles have maybe an ounce of shampoo in them. Either this woman travels very frequently, or she washes her hair very infrequently.