There’s a Costco to one side of Gwendolyn Hammer’s house and a Sam’s Club to the other. But when the 28-year-old needs 12-packs of paper towels, or 36 rolls of toilet paper, she heads online instead.

Once a month she uses her smartphone to place a bulk order on Boxed.com, a website founded five years ago as a millennial-friendly alternative to warehouse wholesalers. There is no membership fee, and most orders arrive within two days. Other times, she stocks up using Amazon Prime.

“I’ve never had a Costco membership, even though I knew shopping there would likely end up saving me money,” said Hammer, who lives in Utah Valley, Utah, and grew up shopping at Costco with her parents. “I do like not having to haul my kids to the store.”

Personally all the Costcos around me in Northern New Jersey are pretty crowded. They are so crowded that I hate going there due to the long lines and massive crowds. Maybe if they weren’t as crowded, I might go there more. How crowded are the Costco’s around you?