The Wildco Beta Horizontal Acrylic Water Sample Bottle Only The materials used in Wildco Beta Water Sample Bottles make them ideal for sampling trace metals and for organic sampling to concentrations of mg/L. The bottle is made of tough, clear acrylic, and no metal parts touch the sample. Rigid, white polyurethane end seals with silicone gaskets and amber latex tubing are used for cleaner samples without fear of contamination by leached materials. 3.2L Volume.