But you quite possibly cannot buy it on Amazon or in any UK shop already without proving you are an adult if your age is in doubt. Do you have a problem with their terms on that page?
"Age Verification Required on Delivery: This product is not for sale to people under the age of 18. To confirm the recipient is over 18 years, valid photographic ID with a date of birth may be required upon delivery. The driver will input your year of birth into their device and may then require an ID check to complete the age verification process. The driver will not be able to access your information once the delivery is complete."
(The "may" here is crucial. I've never been asked to prove I am an adult this way either, because I look like one)
I personally do not find that the skin of fruit ever needs a particularly pointed blade, and I think that is usually an unsafe use of a knife.
I don't mean to suggest you don't need a knife for cutting things, but I would have thought that was an obvious bad faith interpretation.