The only problem is, you would more or less have to buy something first if only in order to have some object upon which to place the engraving. You see the difficulty.
11 seconds sound clip from the Breakfast at Tiffany's movie soundboard.
You can hear this line at 01:12:02 in the Blu-ray version of the movie.
Quote context
[...]
- Well, we tried, but I guess... We could have something engraved, couldn't we?
- Yes, I suppose so. Yes, indeed.
- Well... We could have this engraved, couldn't we? I think it would be very smart.
- This, I take it, was not purchased at Tiffany's?
- I see. Do they still really have prizes in Cracker Jack boxes?
- Oh, yes.
- It gives one a feeling of solidarity, almost of continuity with the past, that sort of thing.
[...]