New hot tub boat cruises let Bostonians soak while floating through the harbor

• They offer wood-fired hot tub cruises that top out around three miles per hour on the calm waters north of Logan Airport.

Why it matters: "Matters" might be a stretch, but it's a novel entrant in the city's crowded field of harbor tours and boat rentals.

• They think a slower, more social experience can draw customers away from typical sightseeing cruises.

How it works: Each tub seats up to six people, is drained and refilled between rides and comes with Bluetooth speakers and waterproof phone cases for guests.

• Founder Marie Bocquet brought the concept to Boston after seeing it in Denmark and pitched it as a natural fit for a city built around the water.

By the numbers: Two-hour rentals start at $493.

What's next: Early riders say they're already planning repeat trips.

• One customer told CBS News Boston she wants to come back in winter to try it year-round.