After enjoying a few drinks, some people go dancing. Others order food. For some, it’s time to shop online.

Close up of someone typing on a laptop.

“I have my account linked to my phone, so it’s really easy,” said Tiffany Whitten, of Dayton, Ohio, whose most recent tipsy purchase made on her smartphone — a phone cover — arrived from Amazon, much to her surprise. “I was drunk and I bought it, and I forgot about it, and it showed up in the mail, and I was really excited.”