This teether can be used alone, or attach it to one of our signature teether clips. This teether is the ultimate sensory teether product on the market. The soft texture, durable material and shape maximizes sensory stimulation, engagement and exploration! Made from 100% food grade silicone, BPA free and dishwasher safe (top shelf). can even be put it the freezer for extra relief. They are non-toxic and do not promote mold growth or absorb odours, making them safe for your little one.