Thank you for viewing. This is a set of 3. I used to put this in the drinking water for my senior cats and adult cats who hate brushing their teeth, but I've gone back to brushing their teeth with a toothbrush while getting scolded as usual, so I no longer use this. I hope someone who needs it can use it. Additive-free, preservative-free drinking toothpaste, 100ml. - Product Name: Drinkable Toothpaste - Contents: 100ml - Features: Additive-free, preservative-free - How to use: Just mix it with water - Manufacturer: Dotras Co., Ltd. - Expiration date: September 2028 We will not accept single purchases or price reductions, so please understand. We are also selling on other sites, so we will delete the listing once a buyer is found. ※ There are no smokers in the house. I am very careful, but as I currently have 7 cats, from kittens to seniors, I apologize if any cat hair gets attached during packaging. ※