Link to a website for those tubes, or at least a name of the company!
Unless it's not allowed for some reason.

Then maybe just what the tubes are called in the industry that sells them.....

Sure, it's American Science and Surplus: http://www.sciplus.com/categor... . The tubes are about halfway down the page. This is a cool place!

Thanks!

o, you're RIGHT!
I could do some serious playing over there!

Wow, encourages me to think even EYE can start plants from seed--and have them survive! Great idea and thank you for the resource.

When you go to pot up those "test tube babies", you might want relatively tall larger pots.;

Some bottled-water bottles are relatively tall for their diameter. But watch out for bottles with ribs, if you plan to re-use the bottles. "Sobe" bottles have ribs that will make it hard to push a root ball out without cutting the bottle down the side.

"Cascade Ice" flavored sparkling water comes in a 17.2 fluid ounce bottle that's 2.5 inches in diameter and 7" tall in usable height. It has completely straight walls with no ribs.

These are a little bigger than the 6” X 2” "test tubes", but not big enough to be used for potting them up.

A 2 liter soda bottle is 4.25" in diameter and 8" tall usable height. Some have straight sides. Those 2 liter bottles can serve as "potting up pots" for either 6x2 or 7x2.5 seed-starting cells, especially if you don't fill the seed-start-cells all the way to the top. However, if the walls of the seed-start cell block the seedlings' bases from the fan or air movement, that may increase humidity and damping off. Keep the soil surface dry!

And empty water bottles and soda bottles are free!

Always with the details, Rick!

Thanks for the tip!

What can I say? I have involuntary monologarrhea.