The same amazing product that you've come to know in larger sizes now works hard, traveling with you in your vehicle, handbag, pocket, or anywhere. This size of Nok-Out is recommended for quick clean-up jobs on-the-go. Think 4oz Finger Spray Bottle of Nok-Out for decontaminating your hands after a nasty job, or spraying on a spill that has just occurred..or where the cat box needs a quick refresher-upper. The 4 oz Finger Spray Bottle is NOT recommended to decontaminate a site of long-standing problem, or one which is deeply embedded. Try the 16 oz or 32 oz Trigger Spray Bottles for that job!