You can easily turn your old baggy T-shirt into a nice soft pillowcase, and you can use a sewing machine or just hand sew it!
Step 1: Materials
All you need is a baggy shirt, scissors, thread and needle.
Step 2: Cut and Sew...
Turn it inside out and cut off the sleeves and the top of the shirt so that it is a rectangle and sew together all the sides but the side with the seam. Then turn it rightside-out and put it on a pillow!
Step 3: Sleep on It! :)
Now you're done!