UPC: 7 85927 20417 4. We’d like to introduce you to the world’s first collapsible cup that folds flat and fits into a small protective case! You can toss it in your backpack, purse, or pocket, and you’re good to go. Then, when you need it, it can be popped open for up to 8 hours of non-stop protection. Hassle-free. Size B. This size is recommended for women who gave birth or for those who have a weaker pelvic floor. It’s perfect for those with the medium flow, too.