Scientists created a special lightweight foam-like material made from bacterial cellulose that could be used in wound dressings, insulation, and water filtration. The material was made sustainably using just tea, sugar, and bacteria—no harmful chemicals needed. Different freezing methods were tested to create the best possible structure, with liquid nitrogen freezing producing the most porous and uniform results. The material showed excellent insulation properties and is biodegradable, making it an environmentally friendly alternative to synthetic foams.