introduced Trip Builder, a booking platform that enables users to buy multiple products -- including flights, cars, hotels and alternative accommodations -- in one transaction, taking advantage of lower prices enabled by bundling.

"You can book a very complicated trip in a single transaction, or you can book completely different trips in a single transaction," said Devon Nagle, head of communications for Priceline.

Previously, Priceline users could bundle a flight and hotel; a flight and car; or a flight, car and hotel. The flight portion of a bundle was required. By bundling together travel products, users typically saved money thanks to privately negotiated rates. According to Nagle, that averaged $240 for a flight-hotel bundle. Users were previously limited by only being able to book one trip at a time, as well.

Now with Trip Builder, users can bundle any number of trips (for example, Nagle said, a user could sit down and book their entire year of travel in one transaction). They can also bundle together any number of products, like hotels and alternative accommodations, for a single stay. The requirement that a bundled package include a flight has been eliminated.

"It's a much more creative way for people to book travel," Nagle said. 

Trip Builder was introduced because of the changing nature of travel, Nagle said. He said consumers are interested in booking more than a simple roundtrip flight and single hotel.

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