I made these for a few last-minute holiday gifts. Each bottle is about $20 to make because of the oils I chose. You could use just lavender or lavender and cedarwood and it would cost much less.
Use any dark bottle to protect the aromatic and therapeutic properties of your essential oils and store in a cool place, away from heat.
Find it online: https://mostlovelythings.com/diy-sleep-fragrance-spray/