Bubbler are handy and disposable units for assisting in semen straw filling. The 'comb' unit holds the filled straws, with the tines creating both a consistent fill nd a tiny air space to prep for sealing. The 'basket' catches the residual runoff from the straws so none is wasted. We also have the 'bubbler support unit' which holds the entire assembly and makes it easier to use. For filling straws, the 20-straw filling manifold (for 1/4cc straws) or the 15-straw filling manifold (for 1/2cc straws) makes the whole job more efficient. Another option for manually filling straws is to use a small luer-tip syringe (1-3cc volume) and a syringe to straw adapter (see the section Syringe to Straw Adapters for components).