Pronounced teh-rhey-RAY, terere (technically tereré with a sharp accent on the e) is the traditional cold yerba mate from Paraguay, where over 90% of the population drinking this form of cold yerba mate daily. Strong, smoky yerba mate is added to a hollowed cow’s horn (known as a guampa) or cylindrical metal gourd, then cold water, ice, and zesty herbs are added to a large thermos; water is repeatedly poured into the gourd and the mate is enjoyed throughout the intensely humid and muggy paraguayan heat. Essentially, terere is yerba mate iced tea. Here’s an article explaining the different types of yerba mate. Interested in cold yerba mate, start with this guideYou can even cold brew yerba mate.