Shola, the white soft core obtained from the stem of the eponymous plant (also known as Indian Cork; scientific name Aeschynomene aspera), has been in use in Bengal since time immemorial. Traditionally, owing to its divine origin and white colour, the substance is considered auspicious, pure, and hence used during religious and social functions.
Being soft and light-weight, shola is often used for making the attire, ornaments and other decorations of idols. It is also used by many indigenous communities of Bengal as part of their sacred rituals.
This can be a very good Eco-friendly alternative to Thermocol which is difficult to handle as waste.