I have posted this before, but not in a dedicated tea topic.
虫宝茶 (chóng bǎo chá) literally means 'insect treasure tea'. The caterpillars of a certain type of moth feed on the baby tea leaves in the plantations. Their droppings are then collected by the farmers and dried. They are then used to make a refreshing cup of tea! They are mixed with regular undigested tea. It is considered medicinal and effective against stomach complaints. I tried a cup before buying this jar. It tasted like tea but with a sort of fungal taste in the background. Not bad.