The purchase date was around February 2024. If you'd like, I can include about 1/3 of the remaining solution, but it's without a cap and wrapped in plastic wrap (please comment if you don't need it). I bought and used this for a while for my cat rescue activities. I got the impression that nighttime crying improved a lot! *For adult cats* Would you like to try it? (=^x^=) FELIWAY diffuser to reduce stress in cats. - Brand: FELIWAY - Type: Diffuser - Contents: Refill - Power Source: AC Plug - Model: Therapy Diffuser Please understand that this is a used item. *No box included* *Please note that the packaging will be simple.*