Glitter in a vase... what a great idea! You don't have to use a mason jar you can just rent vases from Sun Rental!
Our families threw us a beautiful pink, grey, white, and glitter baby shower! It was full of lovely patterned papers mixed with hand painted illustrations and included baby photos of my husband and I as well as a slideshow of my baby bump's progression thus far.
Also on these boards
DIY Gold Mason Jar Vases