Instead, you might consider the
DaysAgo digital timer. The timer affixes to the top of a container and the display on the top shows you how many days have elapsed, up to 99. To reset the time, just hold down the button; a quick press will show you hours instead of days.
The timers are available in packs of two with either suction or magnetic attachments; either way, the duo costs $12 and comes in one of four random colors: Blueberry, Lime, Tangerine, and Charcoal. They use replaceable batteries, too, so you’ll be able to keep yours running indefinitely.