I wanted to know if the containers were easy to refill so I emptied one to try. It filled up great! I rolled the end up like a toothpaste tube and stuck the open end into school glue I poured from a big bottle to a small deep container. It suctioned it right into the tube and filled it up. I think until I can find this glue tube more available to buy, I'll just squeeze the tube and not roll it so maybe not crack the tube over time. It sure is handy.
