It is traditional to make the kottu on a heated iron sheet, used specifically for the purpose, and the cutting up and mixing of the kottu is done using two other rather blunt metal blades. This clashing of metal on metal creates a very distinctive sound, and come late evening the beat of kottu being prepared can be heard rising up from any small roadside restaurant.

Kottu as a Social Document
Kottu is a food that has successfully transcended social boundaries in Sri Lanka. Kottu, which used to be a cheap, takeaway meal for the lower classes has now become almost a staple diet for the upper classes as well, specially among the young and outgoing. It is now a common practice in Sri Lanka for nightclub and party goers in Sri Lanka to end their nights with a kottu as a midnight snack.

Hotel de Pilawoos, a 24-hour Restaurant on Galle road, Colombo, has become - over the space of a few years - the de-facto location for this midnight gastronomy. As a result, a rival to Pilawoos, Hotel Hijra, has emerged almost alongside Pilawoos, and the two restaurants now compete equally for customers. Clubgoers begin driving in late at night, and the crowd is such that Friday and Saturday nights see cars parked blocking the Galle road for passing traffic, and these blocks sometimes require Police attention. Although both these restaurants are highly patronized, the hygiene of their kitchens is questionable. However, reports of food-poisoning or upset stomachs caused by these two restaurants is surprisingly low, and it would seem that the kottu they serve up is perfectly safe, if not for the overly squeamish.

It would be very socially unacceptable for many of the elite who frequent these two roadside restaurants in the nights to be seen on the premises in the daytime. The questionable hygiene of the establishments only add to their popularity as a "slumming" location.