Buying reduced price bunches of about-to-die flowers (they're fine, they just need some love!) and arranging them in scrubbed and de-labeled pasta sauce jars is now a thing I do when I'm throwing a party or just want to cheer the house up a bit. Cheap and easy but sooo pretty...
(Collect jars over time. I save jars from jam, pasta sauce, mayonaise... look for interesting shapes! Remove labels by soaking in soapy water overnight then scraping).
1. Fill up a row of jars with fresh water, all up to the same level. If your flowers came with those little sachets of plant food, share it between all the jars. (Edited to add: apparantly adding a little bit of honey can help them last longer too! Thanks Max California )
2. Seperate your bunch of flowers into types and colours to see what you're working with. Throw away anything completely dead.
3. Start by putting any simple stems in jars of their own. Hold each flower up next to it's jar to see where you need to trim it to fit. Cut the stem at an angle rather than straight across, it helps them last longer. Also remove any leaves that will sit under the water level.
4. Split the bunches between the remaining jars. Take off most of the leaves for a modern look, you want to see mostly flowers and simple stems. Don't over-cram the jars! Whenever I have leftover flowers, even tiny ones, I display them in a tea-cup or little glass to use in another room.
5. Arrange your flower jars in a row on a window, mantelpiece or shelf in height order or randomly... or scatter them all around your home. It's fun creating new looks with different bunches of flowers each time and finding new places to display them :)
Drape fairy lights around them for night time!
So yeah, don't overlook the dying flowers! I always pay silly money and they end up lasting a couple of weeks :)