This is a little tip that is going on around our little town.
When you eat out, you are offered a 'to go' cup. It's a cup full of whatever refreshing liquid, tea, Coke, etc., that you had with your meal.
I get it when offered because I can drink it after the meal, saving me money, keeping me quenched and free from buying another drink.
Just thought you might enjoy it, too. You can always ask for one. Please note the main word, FREE.