Designing and deploying a hybrid data persistence architecture that involves a combination of relational and NoSQL databases is a complex, technically challenging, and error-prone task. In this tool paper, we propose TyphonML, a modeling language and supporting environment, which permits modelers to specify data that need to be persisted in hybrid architectures, by abstracting over the specificities of the underlying technologies. The language enables the specification of both conceptual entities and available data layer technologies, and then how the modelled entities have to be mapped to the available database systems. TyphonML models are used to generate microservice-based infrastructures, which permit users to interact with the designed hybrid polystores at the conceptual level. In this tool paper, we show the different components of the TyphonML environment at work through a demonstration scenario.