September in the Czech Republic is Burčák time.
As Paul learnt from experience, it continues to ferment after you buy it so you need to keep the lid partly unscrewed to let the CO2 escape – or accidents happen! You also have to drink it within two days because it starts to taste bitter after the sugar is converted to ethanol and CO2.
We like its unique taste – a bit like carbonated grape juice with an alcoholic kick. It is quite cheap, sold in large quantities and goes down easily.