PreparaEvak Super Savor Plastic Food Storage, 14 Ounce, Green

are they good to store brown sugar?

are these containers good for storing brown sugar?

How do you open it back up once you’ve pushed it down? I’m afraid I’m going to break it if I just pull

Guacamole went through the tiny holes, I how do you clean it, can I take apart the lid do I can clean it. I can hear the water that's trap inside.