To use, simply open the 57 - gram container and serve the flaked tuna appetizer to your cat. You can give it as a standalone snack or mix it with your cat's regular food. Keep in mind that while this is a great treat, it should be part of a balanced diet. Store any unused portion in the fridge and use it within a day or two. Make sure to wash the container after use. This product doesn't have artificial additives, so it's a healthy choice for your furry friend, but always monitor your cat's reaction to new foods.