If someones sends or makes you a decant from an existing bottle, you then fill it in a phial with spray mechanism: This might create a realistic picture. Dabbing, it has been said, is not so reliable. Also...I don't trust official samples, as I sometimes had the feeling they were of higher concentration. Happened that I got old-stock-samples of fragrances that had been reformulated in the meanwhile. A source of disappointment, to be sure!