Responsa for Shabbat 124:5

רב אשי אמר בעלמא אימא לך פטור ושאני הכא דליתיה לממשא כלל:

R. Adda b. Ahabah said: This implies that if one carries out less than the statutory quantity of food in a utensil, he is culpable. For when it [the flask] does not contain perfume, it is analogous to less than the statutory quantity [of food carried out] in a utensil, and yet it is taught that she is culpable.<span class="x" onmousemove="('comment',' V. 76b; also 93b for an opposing view. Liability is incurred for carrying out any quantity of perfume, no matter how little. Now even a flask without any perfume at all contains its fragrance: this fragrance may be regarded as less than the minimum quantity of food which imposes liability, and R. Eliezer rules that when it is together with the utensil it does involve culpability. — The opposing view on 93b is that the utensil is merely subordinate in purpose to the food, and since the food does not impose liability, the utensil does not either. ');">⁵</span>

Teshuvot Maharam