Innovative Cotton Swabs Contain Pre-Portioned Solutions for Cleaning Eyes, Ears, Teeth, and Minor Wounds Pet Swabs' hollow plastic shafts are filled with just the right amount of solution for a variety of pet care applications for dogs and cats. To use, simply snap the tip of the swab to release the fluid into the cotton tip. First Aid Swabs help clean minor cuts, scrapes and insect bites, and relieve pain and itching. Each package contains 24 liquid-filled 3" swabs.