7 Eleven Bring Your Own Slurpee Cup Days: Fill Any "Cup" or Other 10" or Smaller Object For Just $1.50 On Friday August 19th and Saturday August 20th from 11AM to 7PM Local time. Rules: Item must fit upright through a 10 inch Hole, Cup Must be Food Safe, Cup must be watertight (no leaks!). Anything goes, Coffee pots, fish bowls, containers or anything else. Be creative! Limit one per person.