I love this idea, but all I can think of is "you killed our love fern!" from How To Lose A Guy In 10 Days! LOL
So cool! When you lock it - it's forever - there is no key. Really loving this!! ;)
11 Wedding Unity Ceremony Ideas Love the Time Capsule/Love Letter/Wine concept
Wedding Unity Ceremony Braid w/Ecclesiastes 4:12 by BCPlaxidermy
Rustic inspired unity sand ceremony in glass jars at Disneyland wedding
A cord of three strands is not easily broken. by AmandaGdesigns
Hey, I found this really awesome Etsy listing at http://www.etsy.com/listing/155823492/personalized-wedding-unity-sand-ceremony
rock unity ceremony - Google Search
We're having a unity sand ceremony and I think I like this idea instead of the vases !
Ceremony Ideas: Pebble Tradition (Well Wishes Rocks) - Everyone will hold a rock and bless it during the ceremony.