From the Manufacturer
These BPA-free Siliskins come in a 2 pack and are silicone sleeves designed for glass baby food jars. For parents looking for better ways to travel and use glass baby food jars these small Siliskins are a perfect compliment and solve the problem of breakage while inside a diaper bag or tote. The Siliskins are dishwasher safe and extreme temperature resistant so they are able to remain on the glass food jars while being micro waved or stored in the fridge or freezer. Fits most glass baby food jars.