A Rod of Absorption enables the user to absorb incoming single-target spells as a reaction and store those spell levels for later use:
While holding this rod, you can use your reaction to absorb a spell that is targeting only you and not with an area of effect. The absorbed spell’s effect is canceled, and the spell’s energy — not the spell itself — is stored in the rod. The energy has the same level as the spell when it was cast. The rod can absorb and store up to 50 levels of energy over the course of its existence. Once the rod absorbs 50 levels of energy, it can’t absorb more. If you are targeted by a spell that the rod can’t store, the rod has no effect on that spell.
Given that cantrips are considered level 0 spells, is it possible to absorb a cantrip using the Rod? Or does a level 0 spell count as “a spell that the rod can’t store”?
(Presumably, if this is possible, doing so would not store any additional levels into the rod, but would negate the cantrip’s effect.)