The most famous isso vade are sold from carts along Galle Face, a seafront promenade in Colombo. Each evening, when the gentle breeze, which has travelled for miles over the Indian Ocean, finally encounters land and cools the city, thousands gather here to spend time with family and friends. They walk up and down the promenade, sizing up each isso vade seller to decide which one has the best offering – usually the one with the largest crowd.