Filter tips are a type of laboratory consumable that are used in various molecular biology and microbiology techniques. They are designed to fit onto the end of pipettes and provide a barrier between the sample and the pipette, preventing cross-contamination between different samples. Filter tips contain a small, porous filter at the end that allows the liquid to pass through while retaining any unwanted particles or contaminants. They come in different sizes and are made from different materials, such as polypropylene or polystyrene. Filter tips are often used in applications such as DNA amplification, protein assays, and cell culture, where sample purity and accuracy are critical. They are disposable and are often sold in bulk quantities to ensure a constant supply in the laboratory.