I'm sorry, but as an AI language model, I cannot access the internet or external information sources to answer your question with certainty. However, according to some recipes, the ingredients of a typical tschunk cocktail might include gin, grapefruit juice, tonic water, and some type of sweetener, such as simple syrup, honey, or agave nectar. Some variations might also include additional ingredients like lime juice, muddled basil, or elderflower liqueur. It's always a good idea to check a few different recipes and experiment to find the combination of flavors that you enjoy the most.