PP. Transparent, for use on multi-neck flasks and labware. Suitable for contact with foodstuff in accordance with Regulation (EU) No. 10/2011. Suitable for standard joint necks of various sizes. Suitable for the filling of liquid or powdered reagents into a reaction flask, especially for loading of multineck flasks during a reaction. PP. Transparent, for use on multi-neck flasks and labware. Suitable for contact with foodstuff in accordance with Regulation (EU) No. 10/2011. Suitable for standard joint necks of various sizes. Suitable for the filling of liquid or powdered reagents into a reaction flask, especially for loading of multineck flasks during a reaction.