These kitchen funnel is made of food grade silicone which is soft and flexible with a Heat resistant and can be used in boiled water or other hot fluid for filling bottles. Nothing should be worry about the health damage. The stepped shape design on the outside of the funnel body makes it suitable for containers of various caliber sizes. You don't need to worry about the fit between the funnel and the container mouth. This funnel can be used in transfer loading various liquids and small solid particles or powder used in the kitchen/cooking. Even toiletries, such as spray, shampoo etc. Great for auto care, cleaning, rastaurants, schools and labs !