Syrris produce a range of glassware specially designed for use with Atlas Systems.  A range of 3 neck flasks designed to be compatible with the Stacking Dry Bath (2101041) is available in volumes from 100ml to 1 litre.  The centre port is an A24, compatible with the Stirrer Seal and Guide (2101011) and the side ports are A19 compatible with the small and medium Jacketed Coil Condensers. The 50ml flask has just one central joint.