In the muggle world, the closest thing we have to felix felicis is a little liquid luck in the form of alcohol. This Harry Potter flask is decorated with the name of the good fortune-giving potion described in Harry Potter and the Half Blood Prince. Available on Etsy from AndroidSheepFTW, the 6 ounce flask will give you the courage you need and might even help you get lucky.
The stainless steel, gold color-wrapped felix felicis flask matches the golden hue seen in the Harry Potter movies. The handmade item also makes a magical gift for any Harry Potter fans in your life. The AndroidSheepFTW Etsy shop has a number of fandom flasks for sale as well.