ColourPop Piggy Bank is a slightly cool-toned, medium-dark purple with a matte finish. It is a discontinued eyeliner that retails for $6.00 and contains 0.11 oz.
ColourPop Piggy Bank Creme Gel Liner ($5.00 for 0.01 oz.) is described as a "vivid red violet." It's a medium-dark, pinky purple with warm undertones and a matte finish. So, this shade is "not recommended for the eye area." Effectively, that kind of makes it a lip liner, I suppose. I wore it as such, and it was a little drying and clingy, but it lasted for six hours and was still going strong (just was not particularly comfortable). ColourPop Piggy Bank (DC, $6.00) is darker (95% similar). Stila Violet (P, $22.00) is lighter (90% similar). Sephora Purple Stilettos (DC, $10.00) is more shimmery, lighter (90% similar). Urban Decay Shock (LE, $22.00) is lighter, more muted (80% similar). Makeup Geek Orchid (DC, $9.00) is lighter, more muted, warmer (80% similar). L'Oreal Pure Purple (240) (P, $8.99) is more shimmery, cooler (80% similar). See comparison swatches / view dupes side-by-side.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
Precision of a liquid with the ease of a gel based formula. Apply with a brush, we like a super fine, firm and synthetic angled brush. Dip tip of the brush, coat both sides – be careful not to pick up too much product! Work quickly, as the formula becomes transfer resistant once it dries. Do NOT leave opened for long periods of time or it will dry out and you will be sad. Be sure to close the lid tightly after each use.