Zero Waste Period Made with Medical Grade TPE Hypoallergenic Reusable and Recyclable Free of Silicone, Latex, BPA and phthalates Oi believes you deserve pure inside. By using one reusable Oi Cup you are caring for your world inside and out. The Oi Cup is hypoallergenic and recyclable to provide comfort and protection you can trust. For Women under 25 years old who have not given birth vaginally.