Straw Cleaning Brush (Pack of 2) Straw Bale Education Inspirational Education Some straw bales forming a pile in an old barn of a farm. Rural The Difference Between Straw And Hay The Open Sanctuary Project File:Straw of the rice.08Oct9.jpg Wikimedia Commons. Keep your straw cups clean with these 2 pack Straw Cleaning Brushes. Silicone straws can be hard to get down into to clean. These brushes are thin and flexible to fit down both straight and bent angle straw pieces. Also useful for getting particles and other unwanted material out of tricky spaces. Product Details: The straw brush is suitable for all types of straws. Pack of 2 brushes. Measurement: Full length 14. 7 cm.