Today and tomorrow August 18th & 19th, you can fill your own cup at 7-Eleven for only $1.50! This is from 11am-7pm local time and at participating locations only. That means you can bring almost ANY cup and fill it with a slurpee for only $1.50! That’s a great deal! Your cup must be clean, food-safe, watertight, and no larger than 10 inches in diameter. So, NO 5 gallon pails or baby pools!