Podpiwek is a drink that people in Poland like to make. It's a little bit like beer, but it's not as strong and it's not made the same way. Instead of using yeast to make the drink fizzy, people use a special kind of bread called sourdough bread.
To make podpiwek, people usually start by boiling some water with some special spices like ginger and cinnamon. Then, they add some sourdough bread to the water and let it sit for a few days. During this time, the bread will start to give off some bubbles and make the drink a little fizzy.
After a few days, the bread is taken out and the liquid is bottled up. Podpiwek tastes a little bit sweet and spicy and it's a nice drink to have when you're feeling thirsty. It's also thought to be good for your digestion and some people believe it can even help prevent colds and flu.
So, basically, podpiwek is a special drink that people make in Poland by boiling water with spices and sourdough bread. It's a bit like beer but not as strong, and it tastes a little bit sweet and spicy. People believe it's good for your digestion and health too!