It’s possible that the cups will biodegrade, though at a slower pace, at a lower temperature and humidity. Perhaps the warning to not consider the cups compostable in home garden conditions merely exists to protect the Fabri-Kal company from impatient customers who expect to be able to compost 100 of these cups in a few weeks in their back yards.
I’m impressed by the extent to which Skreened makes an effort to minimize the environmental impact of its shirt-printing business. It uses less-impactful water-based inks. It prints on shirts made in the USA, which therefore aren’t shipped across an entire ocean. Its production center and