Mountain Woman Products Set of 4 Ball Mason Jar Lids with Straws Small Regular Mouth for To Go Cups Find a use for the extra small (regular) mouth mason jars in your cabinet...Hold your favorite beverage without spilling it in your lap! Packaged in a set of 4. Includes 4 lids and 4 straws in varied colors. Handcrafted by a small, Pennsylvania business. Ecofriendly. Make your own ToGo cup! BPA-free lids measure approximately 2 3/4" in diameter (regular/small mouth).