Formaldehyde for the ol' bat.

Oh! For the rose! Not sure.

F.L.

for the synthetic

http://www.sfherb.com/potpourri-recipes.asp

I kind of like just the plain petals with roses myself, not even a wooden bowl. Grams used to just stuff a bunch of stuff in a sachet cache (packet) to keep closets, and dressers sweet smelling.

We found a bunch of soap made with real rose oil last year. That was a cool gift. We even gave some to ourselves.

Here is a link that might be useful: potpourri

You can get essential rose oils on a good number of sites on line. Rose geranium runs under $20 for a 1/6 ounce, rose otto 10% runs around $15 for the same and about $60-$80 for 100% 10% is just fine. I like to add a drop or 2 of ylang ylang or for somthing earthier a drop of clove oil with the rose oils. Rosewood essential oil is also a nice fragrance with dried petals.