You can keep this creamy coleslaw in the fridge in an airtight container for 3-4 days. Unlike most salads, coleslaw is one we don't have to really worry about becoming soggy right away. It actually gets better over time as the cabbage and carrots "marinate" in the dressing and soak up all the flavours! However after 3-4 days, the slaw will begin to lose it's crunch, firmness and some colour. It'll also become soggy and watery. If you know you're not going to be eating it right away, wait to mix the dressing in until just before serving to extend its shelf life.