THE PERFECT SIZE FOR CLEANING: Each dolphin sponge in this set of 3 measures 2.75 x 1.5 x 0.25" CLEAN THOSE HARD TO REACH PLACES WITH EASE: For use in water bottles, baby bottles, wine carafes, vases, or any other narrow neck jar FUNCTIONAL AND FUN: Each dolphin-shaped polyurethane sponge contains silicone balls that help loosen residue on the sides and agitates water to clean hard to reach areas INSTRUCTIONS FOR USE: Simply drop one or more sponges into your container with soap and warm water and shake as needed CARE INSTRUCTIONS: Air dry to help keep sanitized