Henry's Healthy Pet Foods Miracle O-Ring Slip-tip Feeding-Syringe 1cc and 3cc O-ring slip-tip luer syringe For formula feeding orphaned small mammals such as squirrels, rabbits, possums, etc. Rehabber-recommended; durable and reusable Nonstick operation for better feeding control Fits our Silicone Mothering Nipples and Miracle Nipples