A tray for loading a medical device on a catheter assembly includes a reservoir and a temperature sensing and indicating device disposed in the reservoir. The reservoir is defined by a bottom surface, a first wall, a second wall, a third wall, and a fourth wall, and includes an open top opposite the bottom surface. The reservoir configured to receive a liquid such that a medical device may be loaded onto a catheter assembly while submerged in the liquid. The temperature sensing and indicating device senses the temperature of the liquid in the reservoir and indicates to the user when the liquid is at a desired temperature for loading the medical device onto the catheter assembly.
