Theraquatics polystyrene beads have been designed to a particular density, thickness and shape to meet our exacting standards of excellence. Add fresh polystyrene beads to Fabric Float and Aquafit equipment for optimal buoyancy. Sold in 100 litre bags. Packaged in a convenient see through packaging, simply cut a small hole at the corner and pour the beans into your float. Leftover beans? Put the bag with excess beans into a large pillow case and store in an indoor cupboard until needed.