The oil tube was invented by Paramount electric in order to get around the NOMA patent using Methylene Chloride. It was introduced for Christmas of 1947. These bubble lights were called "Crystal Snow" and had tall 4 inch tubes. Christmas by Carlisle is now manufacturing oil tubes with much more vibrant and better colors. The bubbles are small and dance slower; another mesmorizing bubblelight.
Oil Set- 9 Multicolored Lights
Red tube with red and green base, Blue tube with dark blue and red base, Gold tube with red and yellow base, Green tube with green and red base, Pink tube with dark blue and pink base, Red tube with red and green base, Purple tube with dark blue and red base, Gold tube with green and orange base, Clear tube with red and white base