I had some fun with jam jar dyeing (or coffee jar!).
I used an old Moconna coffee 200gm jar and it was the perfect size for 4 fat quarters.
The way I did it was soak the fabric in water.
Add about a cup of soda ash solution to the jar and 1/4 tsp of the first colour of procion dye. I used a lemon yellow.
Wring out the first fat quarter and stuff it in the jar.
Add 1/4 tsp of next dye (turquoise) followed by another fat quarter.
Continue adding layers of dye and fabric to fill the jar. I used maroon followed by olive.
If needed you can add a bit more soda ash solution. For best result you want to really stuff the fabric in.
Leave it for several hours or overnight before washing until the water runs clear.
It doesn't look very exciting in the jar but I think the results are really scrummy.