When I saw Carrie's pigeon purse in #AndJustLikeThat, I had a LOT of questions. Fortunately, costume designers #DannySantiago and #MollyRogers had the answers:
https://ew.com/tv/carrie-bradshaw-pigeon-purse-and-just-like-that-season-2/
https://ew.com/tv/carrie-bradshaw-pigeon-purse-and-just-like-that-season-2/