The inspiration to turn out disposable plates and dishes came during a visit to India around eight years ago, he says.
"When I visited Taj Mahal, I saw a man selling small cups made out of three small leaves," Chandrasiri said.
"I was amazed when I saw it and that’s when it struck me that we could easily make similar plates and dishes in Sri Lanka since we have trees with larger leaves."
Chandrasiri says his leaf products are made from 100 percent bio degradable materials and is leak proof, non toxic and light in weight.
He now supplies local hotels and even exports to Maldivian resorts.
His eco friendly products are high in demand from nearby hotels that use them to serve salads, curries and deserts to foreign tourists.
"Our foreign guests admire these plates and dishes very much. They like to eat out of these locally made environmentally friendly plates and dishes," Lucian Joseph, Restaurant Manager, of Gimanhala, a hotel in Dambulla said.
"We serve bread and butter, salads and grilled fish and chicken in these leaf plates and trays," he said.
"Every hotel offers fruit juice in glasses but with Mr. Chandrasiri's eco friendly invention, we are now offering guests the welcome drink in cups made out of areca nut leaves," Joseph said.
"They are surprised as to how this cup is made from an areca nut leaf without any leaks.
"Some admire them so much that they take a few as souvenirs back with them," he said.
Chandrasiri says areca nut leaves are nothing new to Sri Lanka as they had been used by Sri Lanka' indigenous people called weddas since early days.
"The areca nut leaf is nothing new to Sri Lanka. Our ancestors had used areca nut leaves to wrap food to prevent it from spoiling," he said.
"Food such as meats, honey and fruits had been stored in areca nut leaf bags," he said.
"After using the areca nut leaves the weddas used to wash them and hang them over firewood hearths to make them germ-free," he said.
Chandrasiri is happy that his eco-products are fast becoming popular at parties, weddings, fast food joints, take away outlets and hotels because they are bio degradable, non toxic, light weight, and available in different sizes and shapes.
He is now hoping to aggressively market his products as eco friendly alternatives to non-degradable products like polythene, Styrofoam and plastics that are increasingly clogging drains and filling up mangrove swamps in the country.
He says the biggest challenge is competing with polythene and Styrofoam products made at a cheaper rate than his leaf plates and dishes.
Chandrasiri says it costs him around 50 percent more to make an environmentally friendly areca nut leaf lunch box as an alternative to the commonly used Styrofoam ones.
Right now leaves collected from nearby villagers and far away places have to be brought to Chandrasiri's workshop in Melsiripura, Dambulla to be converted in to plates and dishes.
The leaves are pressed into shape by an electrical machine and once the shape is obtained the remainder is cut away and the rough edges filed away.
"We have a problem with the cost of production because we have to collect areca leaves from far away areas like Kithulgala and Passara which adds on to transport cost," Chandrasiri said.
"Price is very important and I'm thinking of making more plates and dishes out of other leaves like teak, banana and Kanda which are abundantly available and easier to find from nearby areas," he said.
Chandrasiri is also hoping to outsource the production of areca nut leaf plates and dishes to cut down on transport and electricity costs.
"I'm also thinking of giving some of my machines to households that can easily find these areca nut leaves in their own villages," Chandrasiri said.
"Then the transport cost for me will come down and those households can also find an extra income by producing these plates and dishes for me as a cottage industry," he said.
"I'm determined overcome obstacles and develop my products because people who have seen my products have thanked me for turning out bio-degradable tableware," he said.
Chandrasiri says he is aiming to supply these eco friendly products to high end stores like Odel and Barefoot and even supermarket chains like Cargills Food City and Keells in the Sri Lanka..