Preheat oven to 325 degrees F with rack in the center position.
In a bowl, beat the cream cheese and sugar until smooth using a mixer. Scrape down bowl sides and the mixer as needed. Do not overbeat till fluffy.
Add sour cream, pumpkin, eggs, vanilla, and spices. Mix until combined
Pour the cream cheese mixture into silicone molds.
Place the silicone molds into a roasting pan or 1inch deep sheet pan.
In a medium pot, bring water to a boil.
Pour the boiling water into the roasting pan or the sheet pan until it comes about halfway up the side of the silicone mold. Place the pan in the oven.
Bake the cake for about 1 hour 30 minutes, or until the outside of the cheesecake sets but the center is still loose.
Turning off the oven. Open the door briefly to let out some heat. Leave the cheesecake in the oven for 1 hour.
Carefully remove the springform pan from the roasting pan. Cool on a rack for at least an hour.
Cover the silicone molds with saran wrap and place them in the refrigerator for at least 8 hours or even overnight.