These Trio rings are so individually unique, but all fit together as one. The best part about these teethers? You get 3 rings in 1 design! Their hollow design makes them easy for little hands to grab, and their smooth and textured surfaces provide added relief for your baby's gums. Seeing as they are pure silicone, they are also very easy to clean. Simply wash with mild soap and water, or throw them on the top shelf of the dishwasher. You can also put these in the freezer for added relief when those painful teeth start poking through. Teethers are made using 100% food grade silicone. They are non-toxic, which means no BPA, lead, PVC or phthalates.