Where to keep an "Emergency Fund" in Germany

Hello, as I have recently been employed here in Germany, I would like to know how to build an emergency fund from scratch. I plan to keep them in liquid(Cash/Bank) 20% and the rest in some non-risk funds(Bonds/high-yield savings accounts) where I can cash out within a day or two. The "non-risk funds" part is where I am struggling, and I am unable to figure out what might be suitable in Germany. Any advice?