Jello in a jar! Follow directions on the box. Add the water to the jar, heat it in the microwave for 2 min, take it out, add jello mix, cap and lid, shake the s*** out of it for a min, add other cup of cold water, cap and lid again, shake, place in fridge. No dishes, no mess, great to-go jar! Thought of it when I didn't have a small enough container with a lid.