An unusual addition to your police themed party, this is a pack of 6 individual test tube style shot glasses which are in clear plastic and which have the PSI logo printed in black, on the front. Each test tube has a capacity of 2oz and they have flat bottoms for ease of handling and use. PSI or Party Scene Investigation is a range of partywares that will work together to create a pseudo-crime scene setting and they will look great at any police of CSI themed party. affordable and reusable, these will match with other items from the PSI party goods range.