I bought this cute fabric on a whim, from a remnants bin @ Tomato in Nippori years ago and have been hoarding it in my stash ever since. I made a nephew a mask and the rest sat untouched. I need another bag for laundry day so I pulled this out to use since it makes me happy to see. Its about 10 x 10 20 inches. Its lined with some basic muslin fabric. All the edges are sewn a teensy bit to give it more shape without using any stabilizer.
Close up of the corner
Fabric is a light cotton canvas by Kobayashi
Editing to add a photo of the bag filled!
Next to a liter bottle for size reference… before you ask, its filled with alcohol used to clean 3D prints. The grey is uncured resin suspended in alcohol. We were trying to reclaim the alcohol by exposing the whole thing to light, hoping to cure the resin and leave the alcohol, but it didn’t work.