The traditional houseboat of Kerala, called Kettuvallom, means, a boat made by tying of wooden planks together. This craft has evolved over a few decades ago from the traditional cargo carrying Kettuvallams into a makeover of highly popular, eco-friendly luxurious boats. The most esteemed and attractive event is the competition of the "ChundanVallam" or the snake boat, measuring the length of 30 to 60 meters (over 100 ft.), accommodating around 100 rowers, 4 helmsmen and 25 cheer leaders. The boat race is conducted yearly and has been named after Pundit Jawaharlal Nehru as Nehru Trophy Boat Race. Interestingly, the nails are barely used for joining of the planks as most of the planks are bound with coir. The interiors and the exteriors of the houseboat are mostly made of wood. The house boat houses well furnished and luxurious bedrooms, attached bathrooms, kitchen, common wash room for the crew, wash area, spacious living room, romantic sun deck zone and a lengthy corridor for easy accessibility to all the areas. The contemporary house boats have been designed to meet high quality standards.