Lot of 24 test tubes Size 25x200mm with rim - A good Use is Liners for Vases?

Description

Lot of 24 test tubes Size 25x200mm with rim - A good Use is Liners for Vases?
These were purchased several years ago for use as liners for wood vases. They have never been used.
The size is 25mm x 200mm or about 1 inch by 8 inch.
Picture #3 is an example of what can be done with test tubes as flower vases (courtesy of Etsy). Other examples I found are at Pinterest (https://www.pinterest.com/pin/465348573988752995/?nic=1a) and at Architecture Art Designs (http://www.architectureartdesigns.com/11-stylish-ideas-to-decorate-with-taste-tube-vases/).