"To mix the contents" means to combine or blend together the different parts or substances that are inside something.
Sentences with «to mix the contents»
Without mixing the contents of the can, scoop out the cream part on top and place in a medium sized bowl. (womenshealthandfitness.com.au)
When I used the leftovers I put them in the microwave for 20 seconds — and quickly removed the dish, then mixed the contents with a spoon. (bewitchingkitchen.com)
If you heat it in a microwave oven, be sure to thoroughly mix the contents prior to feeding to minimize uneven heating. (cedarbayouanimalclinic.com)