Beautiful!!! Thanks.  I would think that water getting into the test tubes wouldn't be a problem if the tooth brush was given a hard shake before puttung it  into the tubes. Also any water would drip over the edge. Very nice ! 10/10 I subscribed

You have such an artistic flair.  Thank you for sharing this beautiful and unique toothbrush holder.

I love the second design! I definitely need to try this, but I think I want to try using a beaker holder.

I LOVE this idea. I actualyl had an old incense storage thingie with test tubes and a wooden test tube rack and, rather than pitch it (and the stinky incense) I have turned it into a fantastic toothbrush holder. It never would have occured to me without this Instructable, so thanks for posting it.

Be sure to add a link in your Instructable to your Toothbrush Laboratory's Etsy page so it can be included in the Sew Useful Contest.

Great Idea. Will probably make one of these someday. You could also use plasic tesat tubes and maybe drill a hole in the bottom to have the water drain out. Just make the hole smaller than the rocks in the tube.

I like it but doesn't the water still collect in the bottom of the tube?

This is such a cool idea! I think I'll use the idea to personalize the toothbrush holders we currently have that don't really work too well...