Josh at EasyWDW has more reviews up today and one is for Citrus Blossom. He wrote this:
"Most importantly, this is where you’ll find the Souvenir Orange Bird Sipper Cup. On the first day, they were limiting guests to ten cups per person. The following day, the limit dropped to one per person. Supposedly, they have 45,000 cups, which means they may not last much longer. Otherwise, everything on the menu is new."
https://www.easywdw.com/easy/blog/citrus-blossom-review-2019-epcot-flower-and-garden-festival/
During the F&W festival I remember the beaker shaped cups selling out very quickly. They were at Light Lab. It would be nice if Disney bought enough for the entire festivals, not just a week or so. Those Orange Bird cups are soooo cute, I hope they ordered more because I wold love to have one in May also.