In my shaker I used sand which I collected on the beach in Florida which has all sorts of really tiny shells in it!! Perfect for this nautical themed card!! The shaker is under a frame that I cut with my rectangle Nestibilities - so easy to make frames with these!! Added a shell border and some twine for accents and I was good to go!!
For the shaker I used a cello envelope. I found a tutorial on line which used CD envelopes to make shakers. Very cool!! So I just made small envelopes with scrap cellophane and my Seal a Meal. At class, we had a bit of trouble getting the sand to stay on the front of the shaker. It is a balance between having the edges tight enough to not allow the sand in behind and being able to insert the image into the envelope with its little dam of 3D foam tape which keeps the shaker material from settling to far down. Would work much better with a coarser shaker material which would not leak around and out!! Will have to refine that process for future shaker cards!!
Try making some of these! The CD envelopes work really great for square cards and can be disguised so easily!!