A blood collection tube, also known as vacutainer, is a small, cylindrical tube that is sterilized to collect blood samples. The tubes are vacuum sealed with plastic stopper. The blood taken into the tubes from the patients remains stable and preserved in these tubes. Our company, Dhiren Plastic Industries supplies blood collection tubes without any labeling. The cap of the tubes are offered in different colors for a reason; the color is the indication of the additives the containers contain. Additives in the tubes are necessary to either preventing blood clotting or accelerate blood coating. In comparison to glass tubes, plastic tubes are lighter and unbreakable. The different color-coded caps include light blue, red, yellow, green and lavender. Different additives present in color-coded tubes are 3.2% Sodium citrate, Sodium or lithium heparin with or without gel, Potassium EDTA, Sodium fluoride, and sodium or potassium oxalate, etc.