premise: to marinade chicken without mess
hypothesis: Take the pieces of chicken you want to marinade, and put into a ziploc bag. Pour in your chosen marinade, squeeze as much air out of the bag as possible, and seal the bag. Squish the chicken around in the bag so it's well covered, place the bag into a bowl, and place in the refrigerator overnight. Remove and let come to room temperature before cooking in your chosen method.