<human>: How do you do this: How can I know how much paint is in a tightly sealed can?

OPTIONS:
- After you finish painting, and before you close the paint can, paint a line across the label to show the paint level, that way you’ll know how much and what color the paint is without opening it.
- After you finish painting, and before you close the paint can, paint a line across the inside of the can to show the paint level, that way you’ll know how much and what color the paint is without opening it.
<bot>: After you finish painting, and before you close the paint can, paint a line across the label to show the paint level, that way you’ll know how much and what color the paint is without opening it.