"You should donate $18 because it's 'chai'."

"We're buying her a beautiful chay to wear around her neck." (Glinert)

"Nevertheless, the meal still begins with the three crucial items that many Iranian Jews have used to break the fast for generations: a cup of fragrant black Persian chai, a soft-boiled egg, and a cup of faloudeh sib – a reviving mix of shredded apples in a lightly sweetened rose water syrup, served over ice." (source)