Otiluke's Freezing Sphere has an interesting "delayed blast" feature, which involves creating and handling a physical globe containing the spell's energy:
You can refrain from firing the globe after completing the spell, if you wish. A small globe about the size of a sling stone, cool to the touch, appears in your hand. At any time, you or a creature you give the globe to can throw the globe (to a range of 40 feet) or hurl it with a sling (to the sling’s normal range). It shatters on impact, with the same effect as the normal casting of the spell. You can also set the globe down without shattering it. After 1 minute, if the globe hasn’t already shattered, it explodes.
However, the duration of the spell is instantaneous. So I wonder what would happen if the globe of a previously-cast Freezing Sphere spell were tossed into an antimagic field. Or what would happen if I cast Dispel Magic on the globe. Would the globe disappear, or is it no longer considered magical and thus immune to these effects?