A coffin is a box that a dead person is put into. Coffins are either buried in a cemetery, put inside a mausoleum or burnt into ashes in a crematorium.
Crates are square wooden or plastic boxes that are used to store things in. They are mainly used for transporting goods in.
A dispenser is a container with something inside it that has some way of letting you take small amounts of the thing inside. For example, you might have a dispenser that dispenses sticky tape, or liquid soap, or paper towels like the dispenser in the picture.
A dumpster is a large outdoor bin for throwing away trash.
People use a dumpster to hold lots of waste, like leftover packaging, paper, or construction debris. You often see dumpsters at places like stores, restaurants, or work sites. A dumpster is usually placed on the ground and emptied by a waste truck when it is full.
A fish tank is a glass container you keep pet fish in. You can also keep turtles, hermit crabs or even mice, lizards, frogs and snakes in a fishtank.
Obviously, if you are keeping land animals in a fish tank you don't fill it with water, you put dirt in the bottom and grow plants. A fishtank with plants in it is often called a vivarium. You usually keep mice in a fishtank with sawdust at the bottom instead of dirt, so you can regularly change the sawdust to keep it clean.
A gas can (also called a jerry can) is a container used to store and carry fuel like gasoline or diesel. It is usually made of plastic or metal and has a handle and a spout for pouring.
You might use a gas can to fill up a lawn mower or take extra fuel with you on a trip.