I keep forgetting that I told you I'd post links to YouTube videos of straw exercises so that you can do them at home.
I love how we hummed O Canada through our straws on election night. It was so good! And, I have to admit it wasn't entirely my idea. In his video, link here, Ingo Titze recommends the American National Anthem. My timing was pretty perfect though, I must say.
You'll notice that there are lots of straw videos. Ingo Titze seems to be the guru of this practice.
Here's another straw video. Vocal chord strain for singers is the theme here.
This one starts with blowing bubbles in a glass with your straw. Fun!
Have fun and keep bringing your straw to choir on Mondays!