More curious little thing than practical - there are long-thought out and thought-out things, but there are design studies and failures. More for the collection and the museum) in everyday life it is strange to use it - it opens the cans, but makes them dangerous and inconvenient . Pros below: A strange decision of the next "designers" out of boredom ., cuts the can on the side under the stiffener. Only suitable for tall jars - from which the contents are immediately emptied. The jar becomes dangerous with sharp edges and loses rigidity - it is already extremely inconvenient to use the jar in the future. I got white, which is also the saddest option . generally well done / but ordinary knives are more convenient Cons below: The meaning of this design is incomprehensible and inconvenient - only if you need to empty a number of cans at once .