Places like Michael's and (sometimes) JoAnn's online sell metal pinpoint tips and also small plastic glue containers with metal tips. These tips can be screwed onto Elmer's Washable Glue containers. At Michael's, I think the metal tips are hung in the scrapbooking area. Might not be exactly identical to Roxanne's, but they work in just the same way.
A tip I read is to keep a small jar handy with a piece of damp sponge in the bottom. When not in use, store the glue bottle tip-side-down in the sponge to keep it from clogging up while you are working.