Massdrop offers the Kinkajou Bottle Cutter in five colors (Fiji Blue pictured) for $36.99 plus $9 for shipping. That's the lowest total price we could find by $2, although we saw it for $1 less in May. The kit includes two silicone separation rings, a glass finishing tool, and three pieces of silicon carbide sandpaper. Deal ends October 15.
Note: This item is estimated to ship on November 4.