I had the same question. The coupon came to my home address, but I never ordered $150 worth of stuff. I asked my office manager what to do and he said to keep the free gift.. Sometimes I got offers for $30 off $150 or a free item. In those cases I always took the dollars off. I never took a free thing for myself if I could have used and offer to benefit my boss. These offers never came to the business, only my home address.
I once ordered something for the office and we couldn’t use the item . I called up to return it, and was told that they will credit us and no need to return the item. It was totally useless for the office, so I called my Rav to ask if I could keep it and he said no. It belongs to the office. I asked my boss if I could take some of it home and she said that I could take the whole thing. I only took some.