The Pemulis Floating Dolphin Keychain costs five dollars. It is a small turquoise vinyl dolphin. It floats. That's it.

We ordered a box of them because Molly thought they were funny, and then something happened that nobody expected: people started buying them in multiples. Not as a joke. Well, partially as a joke. But also because they kept giving them away and then wanting one back for themselves.

Here's what we know about the dolphin keychain after watching it move through the Outer Sunset for the past few months:

It is the single most effective conversation starter we have ever carried. People walk into the shop for the first time, see the dolphin bin by the register, and suddenly they're telling us about their favorite surf spot or asking about fins. A five-dollar keychain is doing more customer acquisition than anything we've spent actual money on.

It actually floats. We tested it in the ocean. If you drop your keys off the seawall at the end of Judah, the dolphin bobs right back up. This has reportedly saved at least two sets of car keys, though we cannot verify this because surfers exaggerate.

It has become a thing at Ocean Beach. You can spot them hanging from rearview mirrors in the parking lot, clipped to wetsuit bag zippers, dangling from surfboard racks. Someone put one on their motorcycle key and now half the moto guys in the neighborhood have one too.

We restock them every couple of weeks. At five dollars, nobody thinks about it — they just grab one. That's the whole point. Not every product needs a backstory or a heritage narrative. Sometimes a small vinyl dolphin just does its job.

Get one here. Or three. You'll end up giving two away.