Renting a car for a road trip usually involves checking the fuel level, adjusting the mirrors, and maybe scanning for any existing damage. But one woman's routine inspection of her Enterprise rental turned up something she definitely didn't expect to find. Turns out, it’s more useful than you’d think. In a trending video with more than 45,000 views, content creator Stephanie (@stephweb40) documented the moment she found what, to the untrained eye, appears to be an unusual item left behind by previous car renters. "What is that inside my rental???" the on-screen caption reads. Stephanie explains that she got a rental from Enterprise for Christmas vacation, "and I'm just, you know, checking all the cubby holes." As she opens the passenger side compartment, her tone shifts from casual to confused. "Looking here, what? What? What is that? Oh my God. I mean, is that what I think it is?" she says. She continues processing the discovery out loud. "Is that a female pee thing, like, you're on the road? This car only has 5,000 miles on it. So, I mean, I know it's not been on many trips, but, oh, I mean, I mean, I don't think it's a courtesy from Enterprise that they're doing that for long road trips," she says. Stephanie's uncertainty about what to do with the item is clear: "I mean, I don't know what to do. I throw it away. I don't know what to do. " What IS This? While Stephanie seemed baffled by the discovery, female urination devices—also known as FUDs, pee funnels, or stand-to-pee devices—are actually becoming increasingly common among road trippers and outdoor enthusiasts. According to AARP, these devices are recommended solutions for women who need bathroom options while traveling, since it’s more complicated for women to pee outside or in a car than for men. Popular brands include GoGirl, Freshette, Tinkle Belle, and Road Trip Potty, with products ranging from simple funnels to more elaborate systems with collection bags. The devices have gained traction for practical reasons beyond just avoiding dirty rest stops. They're particularly useful for women stuck in traffic with no place to pull over, those traveling through rural areas with limited facilities, or people who want to avoid unsanitary public restrooms. Some products, like the Road Trip Potty, are designed to be stored discreetly under car seats for emergency bathroom breaks. Plot Twist As it turns out, what Stephanie thought might be a female urination device was likely something far less awkward—a funnel that comes with vehicles equipped with capless fuel filler systems. According to Capital One, many modern cars have done away with traditional twist-on gas caps in favor of a spring-loaded flap system. The capless fuel filler, pioneered by Ford and now standard on many Ford, General Motors (Chevrolet, GMC, Cadillac), and Honda vehicles, makes filling up faster and cleaner. Instead of unscrewing a gas cap, drivers open the fuel door and insert the pump nozzle. The system automatically latches shut when you remove the nozzle. Here's where the funnel comes in: While the capless system works great at gas stations, you need a special funnel if you ever have to pour fuel from a gas can into your tank—like if you run out of gas on the road. Several manufacturers, including Ford, include this funnel with their vehicles. The funnel is typically stored somewhere in the vehicle, often in a compartment or with the spare tire tools. The confusion is understandable—without context, these funnels can look pretty mysterious and do resemble the shape of a female urination device. Commenters React "Former enterprise employee, yes it’s for funneling fuel into gas tank with ease during emergency situations," a top comment read. "Most new vehicles come with tamper proof gas tanks and you use that's to refuel," a person said. "It’s a funnel if you run out of gas you can put fuel in from a gas can. Without that, you won’t be able to put fuel in. It’s not what you are implying it is," another wrote. Motor1 reached out to Stephanie for comment via TikTok direct message and comment, and to Enterprise via email. We'll update this post if either responds. We want your opinion! What would you like to see on Motor1.com? Take our 3 minute survey. - The Motor1.com Team