I could play for hours trying to get the bubble in the bulls-eye. ($42)
Their made from glass and stainless steel and also come in yellow.in yellow. If moving bubbles in liquid are your thing, take a peek at these engineer cufflinks.
Buy these cufflinks
She has more of those cufflinks on her website.
http://sherrytruitt.com
Thanks Scott, it seems that her etsy shop is no longer working.
Her Etsy shop is back open.
She is also here:
http://www.trunkt.org/sherrytruitt
http://sosherry.blogspot.com
http://www.flickr.com/sosherry