They have trays of different sizes so you can get one that fits your needs. I originally was sold when they got ceramic versions of the 2 and 1 cup sizes. You may have seen ads or posts on lego lunches with these. I find the stoneware too heavy for everyday work lunch use but I like using them for meal prep and storing leftovers so I don't do the lego lunch method. 

 The silicone is high quality too! I like that the ends are stiff so they keep their shape when you hold it. Its super easy to clean and easy to pop the frozen food out. The best part is that they are also oven proof so you can even bake things in it. The clear plastic lids are also really high quality. They can get stained from red foods so I like to put a layer of plastic wrap to keep it clean. The stoneware gets clear silicone covers which are really well made because its not a hassle to take it on and off. Its stretchy enough to get it on and off and thick enough to not tear or get damaged. They don't even warp and you can microwave them. They do get stained from red food but its minimal and it can come off slightly over time from washing.  

 I've stored a very fishy scented soup in one and it did hold onto that smell for a little while before I don't smell it anymore from storing other foods. So I feel it be better to store smelly foods in the ceramic ones instead. 

 Inside each mold are measurement lines. I got the ice cube tray one which are 2 tablespoons but the lines help if you only need 1 tablespoon. 

The cubes shapes makes it easy to store and appealing. I tend to just keep the whole thing in the freezer since I didn’t want to use up a plastic bag. But it would save more space if you store them in a bag after it’s all frozen. 

 Overall I highly recommend it! High quality materials and product design. There are many knock offs but they can’t beat Souper Cubes. I definitely think it’s worth it. Best to wait for a sale if it’s out of your budget!