Nothing beats the Miracle Oring Syringe with its ease of glide even after many repeated uses. Once you use the Miracle Oring Syringe, you'll never use anything else. Each syringe is sterile-packed, BPA free, and comes in tamper proof packaging. Please be advised that the ink on the syringes will not stay on after multiple cleanings, as it is non-toxic. This is not a sign that the syringe cannot be used- the materials that the syringe and plunger are made of will long outlast the ink on the label, as well as many other syringes available. All packages of syringes come with Amazon Transparency codes for authentication. For handfeeding small neonate mammals such as kittens, squirrels, rabbits, mice, rats, and toy breed puppies, we recommend always starting with much smaller syringes such as the Miracle Oring Syringe in 1 ml or 3 ml sizes. The Miracle Oring Syringe is for use for handfeeding animals only.