How do I drink froma vacuum flask?

I got a vacuum flask that resembles a shotgun shell for Christmas, but there is one problem - the brass comes off, as it is a cap, but when I push the button on the container, which I though was to drink from, water comes from around it, spilling it all over my chest. This seems like potentially dangerous flaw, as most people store hot drinks in their flasks. Any help would be appreciated!

Goodhart10 years ago
I agree with Weiss (etc) :-) When you do a search for "vacuum flask" you come up with a whole lot of variety of pictures.
Could you post a picture of it? By what you've said, it seems like the cap may be a cup...maybe you're supposed to pour, and not drink directly from it. Catch my drift?