VST Baskets Sometimes the manufacturers baskets just don't sit right. VST baskets provide uniform distribution on a consistent basis - for good. Designed and created specifically with holes from a micro-machine and finisher, each hole on a VST basket has been measured for minimum and maximum range limits. VST Baskets - 2 Options Available Ridged - the standard ridged VST basket contains an indented ring near the top of the basket to ensure the basket stays fully inserted into the portafilter. Ridgeless - A ridgeless VST basket is alternatively held in by tension and has been the basket of choice for all leading cafés and professional baristas worldwide.