Poster Mailing Tubes, 1 per invite (about $1 each)
Thin Sharpie Pen in Any Color (blue is a good choice for a beach party)
Stationary of your choice
Ballpoint Pen
Steps
Write "You're Invited" on the smooth part of each of the large shells using a Sharpie.
Insert a handwritten note on the stationary of your choice inviting guests to your beach party. Be sure to include the date, time, RSVP date and details about attire. Ask guests to arrive dressed in casual beachwear.
Roll up the invitation and insert into the poster tube. Add one "You're Invited" shell and a handful or two of sand. Close up the invite and take them to the post office to determine the accurate weight and necessary postage.