Silent Treatment

You're having fun slurping at the seemingly endless last sip of your Big Gulp.
The watered-down pop snaps through the straw barrel like a machine gun,
but the sound of melted ice drowns out her eyes.

This fountain drink was a treat. From her, tomorrow's refill is free.
Milk money could buy you a sweet future full of carbonation and corn-syrup.
But, when black holes form, you'll carry false fillings in real cavities forever.