Adding strength to what you've said:
"Starting now, enjoy a refreshing Iced Coffee, icy cold Frozen Raspberry Lemonade, oh so delicious Iced Latte or thirst quenching Frozen Lemonade, each for only $1 small plus applicable taxes. Summer's short, so get out and enjoy!*
*At participating restaurants for a limited time."
Tim horton's: http://www.timhortons.com/ca/en/menu/me ... 2013#10281
Respectfully, unlike McDonald's, there's no free refills.