I bought a bottle of Roxanne's Glue-Baste-It at my local quilt store. The first bottle was $4.50 for 1/2 oz. Then I was at another quilt store and found a larger bottle. 2 oz. for $9. VERY expensive. But I have done two big quilt bindings with them and there is not much gone. The fine tip is economical. The small bottle came with built in plastic tip. Probably not refillable, but the larger bottle came with two metal tips, a cap for the top, and a plastic poker to clean the tip. I haven't had to clean the tip. Besides the tip comes off and you could clean it with water. When this bottle is empty, it will be filled with washable SCHOOL Glue.
JoAnn's did not know what I was talking about when I asked for the school glue. They had many bottles of regular glue near the checkout. When I tried to talk to the manager about stocking school glue, she did not seem interested!