Hi, I was wondering, if someone gives me a carton of cigarettes on condition I give him back a carton, may I give him back a better brand,better quality cigartettes, is there a problem of ribis on this matter?
Yes, giving him a different brand will involve a problem of ribbis. You “borrowed” something worth 100 and are returning something worth 120.
Rather, you should ensure that cigarettes of the same value are returned.
There are certain differences that people, such as neighbors, are not particular about, and for which slight differences in the returned product are permitted. This is not the case for brands of cigarettes.