A box?  Lots of different boxes are sold at Hobby Lobby.  You could even paint it marine blue.

Ring Bearer Box Shabby Chic Rustic Wedding by CountryBarnBabe - you could re-purpose the box that BJ gave you @ your Dad's funeral for this!

Wedding Card Box Bling Card Box Rhinestone by LaceyClaireDesigns, $197.00

Wedding Card Box, Bling Card Box, Rhinestone Money Holder, Unique Wedding Gift Box - Custom Made in your colors and tastes production time: