Our nesting sample cups are made of durable polystyrene material. These cups have a volume capacity of 1ml, 2ml, or 3ml making them ideal for small sample sizes. 1ml cups are designed to fit 12mm and 13mm test tubes, while 2ml cups fit 16mm tubes. These cups can be easily nested together to save space and are perfect for use in a laboratory or research setting. With their sturdy construction and precise fit, these nesting sample cups are a reliable choice for your sampling needs.