These are blue and white ceramic soup or noodle bowls, potentially in a traditional Chinese style.
The bowls feature a distinct blue wave or dragon pattern on the exterior rim and a white interior.
They appear to be part of a larger dinnerware set available for purchase in places like Kampala, Uganda.
Similar styles are often described as suitable for serving noodles, soup, or salad.
The material is ceramic or porcelain, a common choice for durable, everyday dinnerware.