Whole blood tubes include the additive liquid dipotassium EDTA.
The attached cap is color coded purple to designate the type of additive that is in both the capillary tube and the micro tube.
Pre-assembled with a capillary straw, attached pierceable cap, and a microtube
Printed on the micro tube are the lot number and expiration date as well as fill lines.
Clear plastic tubes work well for pediatrics and neonates.