I like this idea, but would try to extend the water theme. Put plastic fish inside with a gift card to Bass Pro Shops! A gift card to the pool store or local water park would be fun too. I'm all about making the gift card connect.
These would make such great wedding favours with cookies or tea inside... You could use a silhouette of the couple instead or what an awesome favour if you're having a tea party....brown paper, computer silhouettes printed out and cut out, paper doilies and white string--all at the dollar store...cheap, cheap but very unique. wedding decor; decorations; $store;
25 Feet Slate Gray Kraft Wrapping Paper by WrapAndRevel on Etsy