I thought this was a neat idea as well. Basically the bride and groom were to bury this bottle or store in in a cool dark and dry place. Then, on their 25th wedding anniversary they were to open it up and celebrate OR… they’d make a pledge and if times ever got really bad they’d not only open the bottle but they’d read the love notes they wrote to each other sharing how they felt about each other in the “Now”. I liked it because it had an old school element and nothing is cooler than a time capsule. Below is one like they had from Amazon.