amber EPA VOA vials with high quality Sigma-Voa Vial Supplier Analytical Vials - Sigma-Aldrich Precleaned Vials. Our precleaned, Type 1 borosilicate clear or amber glass vials are washed in non-phosphate detergent, rinsed three times with tap water, and rinsed with ASTM Type-1 organic-free water to remove detergent.