I've only been vaping for 2 weeks but realized that I needed to ID the new flavors that I was trying simultaneously. So I found that Staples (or probably any other office supply store) had Avery 1/4" color-coding labels that are round (like dots). The pack gives you 768 dots on 4 sheets in 4 colors (yellow, red, green, blue). I figured I could use the greens for menthols/mints, the yellow for the vanillas, coffees, nuts, RY4s, the blue for any fruit flavors, and the red for the cinnamon (and anything else spicy including apparently, some of the "tobacco" flavors).
The dots seem to hang on to the cart pretty good and appear juice-resistant (a piece of scotch tape might also help if needed) and are supposedly removable/replaceable. They only take up a tiny bit of real estate on the cart but have enough room for me to write 1 or 2 initials of the flavor on the dot with an ultra-fine sharpie... and so far so good!!!
