The old mints used to say F and L on them, (Full strength 4mg and Low strength 1.5mg). Maybe they had to change that to the current 4 and I presume 1.5 stamped on the top, so they were made to change it. There's a second compartment behind the hole.
The old mints used to say F and L on them, (Full strength 4mg and Low strength 1.5mg). Maybe they had to change that to the current 4 and I presume 1.5 stamped on the top, so they were made to change it. There's a second compartment behind the hole.