Hi dewey,
Trusbx once posted a link to a webpage that had excellent instructions for sealing straws for use and reuse as small containers. Unfortunately, the website no longer exists. It was written by someone calling herself Kekawaka.
For our immediate usage, I've posted a copy of her page here. I've done a search and cannot find a new location for her site with all of its tips. I'm hoping it'll show back up on the web eventually, and, when it does, I'll change the page I've posted to redirect to her new page.
Stay safe,
J.T.