The Pampered chef Flexible Funnels Funnels are made of silicone so they will not break or crack Silicone is flexible so the funnels can be shaped to fit into odd-shaped openings, like salt and pepper grinders. Nest for efficient storage, and the unique square shape keeps them from rolling off a counter. The venting ridges on the sides of the spout reduce air and force liquids to flow through the funnel faster while creating a secure grip in the bottle openings. Spout on the large funnel is almost 50% wider than most funnels on the market.