As for the greenery that I used, I have a bin of random floral that I have collected over the years and I just cut some of that up and put it into the glass bottles. I tend to like the looks of faux greenery that isn’t ‘shiny’ or plastic looking, and of course that is always the type that costs the most, so buying off season/clearance and keeping them in a tub is a way to offset the price.
Another really good deal that I found at Target in their spring floral area, are their small faux eucalyptus plants. They are surprisingly ‘dense’ and nice looking for the amazing low price of $5. My target still has them available, and I will be snatching up a few more and putting them all over my house!
Here is a photo of how I used these plants on my table (they come in a nice white planter, and I just set them inside a larger white pot that I already had).