PHILADELPHIA (CBS) — Feeling thirsty? If so it’s time to hunt down your old little league trophy, find mom’s giant mixing bowl and make sure the beach bucket is free from sand in preparation for Bring Your Own Cup day at 7-Eleven.

On Friday, Aug. 19, and Saturday, Aug. 20 between 11 a.m. and 7 p.m. customers will once again have the chance to use any cup or container of their choosing for their Slurpee.

And they’ll be able to get their fill for just $1.50.

The cup has to fit upright through a 10 inch hole and only one cup is allowed per person. Click here for a full list of rules.

Those who participate in the event are being asked to use the hashtag #BYOCUPDAY on social media.