We make Better for All cups with a bio-based material called PHBH. PHBH is certified to fully decompose safely in various land and water environments. To ensure that our cup meets the home composting standard, we submitted cup samples to an international lab referred by TUV and BPI, the international and U.S. based compostable certification bodies that monitor and set composting certification standards.
The progressive photodocumentation shown above is the decomposition of a Better for All 18 oz cup in pure PHBH tested at the lab at room temperature. The test for Home Compostable Certification can last up to 26 weeks.
Original cup samples, cut into 1″ square pieces and then blended into living soil (soil that contains organic material and soil microorganisms).
WEEKS 4 & 8
The cup pieces showed little or no decomposition in the first and second tests results during Home Composting testing.
The cup pieces have started to decompose visibly. Pieces are “eaten away” at the edges and have lost molecular weight.
The cup pieces have almost completely disappeared from both test buckets, with only thicker areas of the cup like the rim of the cup still evident in the testing soil.