NO BubblesThe bubbles of the silicone rubber always will self disappear within 2 hours at room temperature, no vacuum degassing is necessary. | Safe & No OdorMade of 100% pure food-grade silicone, BPA-free, no chemical odors & non-toxic, friendly to kids or baby. | Sturdy & FlexibleThe finished silicone molds are flexible and sturdy,you can repeatedly used many times for your project. You always can add mica powder or silicone pigment to create new colors. |