Record-Breaking Bathrooms: 5 Surprising Bath-Related World Records / Updated for 2025

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Record-Breaking Bathrooms: 5 Surprising Bath-Related World Records

Published: 2021-01-05 02:00 EET | Updated: 2025-03-06 15:18 EET 

It’s easy to assume that the bathroom is simply a place to wash, unwind, and de-stress after a long week. While that’s certainly the case for most of us, there are those who take the bathroom to the next level. In fact, there are some folks who take it all the way to record-breaking levels.  

Back in 2021, we first explored some of the most surprising bath-related world records. But four years later, in 2025, the world of bathroom feats has evolved, and we’ve uncovered some incredible new achievements to share. So, we’ve dusted off our research, plumbed the depths of the web, and found five astonishing records that have at least something to do with bathrooms. Oh, and before you ask, none of them involve baked beans…  

Here are our updated picks for 2025:  

#5. The Fastest Bathtub on Wheels

In 2021, we marveled at people showering together, but in 2025, we’re speeding things up—literally. Meet the world’s fastest bathtub, a record-breaking creation by Swiss engineer Hannes Roth. This isn’t your average soak: Roth attached a bathtub to a go-kart chassis, powered it with a 120-horsepower Yamaha R6 engine, and hit an average speed of 186.82 km/h (116.08 mph) on May 6, 2016. But in 2024, he pushed the boundaries further, tweaking the design with aerodynamic enhancements and clocking a jaw-dropping 201.3 km/h (125 mph) at a test track in Germany. Complete with dual exhausts and a functioning showerhead (just for show), this tub proves bath time can be a high-octane adventure.  

#4. The Longest Shower Marathon

Back in 2021, we didn’t feature this one, but it’s too impressive to ignore now. On January 27, 1972, Indiana University student Dave Hoffman set a Guinness World Record for the longest shower ever taken—174 hours (over a week!). Fast forward to 2023, and this record was smashed by eco-activist Lena Müller from Sweden. She endured a 192-hour shower (8 days straight) using a solar-powered, water-recycling system to highlight sustainable living. Monitored around the clock, Lena kept her skin intact with biodegradable soaps and emerged triumphant—pruned hands and all. Here at Spa Baths Co., we’re all for sustainability, but we’ll stick to shorter soaks, thanks!  

#3. The Most Expensive Bathroom in the World

Some things don’t change—luxury is still king. In 2021, we noted a £2.4 million bathroom in Hong Kong, decked out in gold and gems. That record still stands, but in 2025, a new contender has emerged: a £3.1 million bathroom in Dubai, unveiled in late 2024. Built for an anonymous billionaire, this opulent washroom features a solid platinum toilet, diamond-encrusted faucets, and a whirlpool bath carved from a single block of rare black marble. The ceiling? A retractable skylight with a built-in holographic display of the night sky. We know a thing or two about bathroom luxury at Spa Baths Co., but this takes extravagance to a whole new level.  

#2. The Largest Bathtub Ever Built

Size matters, and in 2025, we’ve got a giant to prove it. Replacing our 2021 entry about mass showers, meet the world’s largest bathtub, unveiled in Japan in June 2024. Measuring 10 meters long, 5 meters wide, and 2 meters deep (roughly 33 ft x 16 ft x 6.5 ft), this behemoth holds over 75,000 liters of water—enough for a small village to soak together. Crafted from reinforced acrylic and equipped with 50 whirlpool jets, it was created for a spa resort in Hokkaido to celebrate the region’s hot spring heritage. It’s not just a tub; it’s a communal experience. Our own whirlpool baths might not compete in size, but they’re perfect for a more intimate unwind!  

#1. The Longest Time Submerged in an Ice Bath

Wim Hof, the “Iceman,” was a highlight in 2021, but the ice bath crown has shifted again. Austrian endurance athlete Josef Koberl reclaimed the title in 2023, submerging himself in an ice-filled tub for an astonishing 2 hours, 30 minutes, and 12 seconds—beating his own 2019 record of 2 hours, 8 minutes, and 47 seconds. Set in Vienna with temperatures hovering at 1°C (34°F), Koberl’s feat required superhuman mental focus and physical resilience. Wim Hof might be plotting a comeback, but for now, Josef reigns supreme in this chilly bathroom-related record. Brrr—we’ll stick to warm whirlpools, thank you very much!  

So, there you have it—our updated 2025 roundup of the wildest, weirdest, and most surprising bath-related world records. From speeding tubs to icy plunges, these achievements remind us that bathrooms can be so much more than a place to scrub up. Got a record-breaking idea of your own? We’d love to hear it—just don’t ask us to join you in the ice bath!  

For more bathroom inspiration (minus the frostbite), explore our range of luxurious whirlpool baths and accessories right here at The Spa Baths Company.