ColourPop Touch the Sky is a cool teal with a metallic finish that is limited edition and retails for $6.00. In comparison, Natasha Denona Flip (367M) is a cool teal with a metallic finish that is limited edition and retails for $29.00.
Natasha Denona Flip (367M) is 95% similar — it is less shimmery, darker, cooler.