The “Blossom uCap Silicone Sipping Cap – standard blue” is a sipping cap for standard-mouth Mason jars, which has a convenient straw hole for easy sipping. The one-piece / multi-use sipping cap prevents splash-outs, limits spills, and will never ever rust. It snaps on snuggly over the mouth of any standard-mouth Mason jar. This product is made from food grade blue colored silicone, and is fully compliant with FDA food-safe silicone requirements. Another innovative, lifestyle enhancing, fun idea from Spice Ratchet.