You can make hotpot sauces ahead of time in a couple of different ways. First, you can prepare the ingredients and have them ready to be set out for your guests ahead of time. Store them in an airtight container in the refrigerator for no more than one day. However, ingredients like minced garlic, grated daikon, sliced Thai chili peppers, and chopped cilantro are best enjoyed the day of. If you mix up the sauces for your guests ahead of time, you can also store them in the refrigerator in an airtight container earlier the day of, but I recommend letting your guests make their own dipping sauce since it's part of the fun.