As you can see in the image (ETSY) Here is a great new idea for the newly weds either as a gift from a guest or as something that they can do to make your vows much more fun in a civil ceremony.
These can range from £15 and upwards online so check out some examples as well as the one on the above link..
I think it could be a really good opportunity to make part of your wedding day much more fun with these fun style first fight/argument boxes, you could either gift them as a wedding present or the Bride and Groom could make it a lighter part of their vows or part of the cutting of their cake.
what you do is pop a love letter and a bottle of your favourite bubbly or wine inside the box ready to break open and break the ice on your first major argument as a married couple.
One good idea would be to make it part of your wedding reception or post vows by actually introducing a hammer and two nails and nailing it shut together (one nail each). A great way to incorporate some light humour on your wedding day, and a fun gift from a guest.