Euclid's Encoldening Enclosure

You bestow a box up to 10 cubic feet in volume with encoldening properties. The effects of this spell remain for 8 hours. Foods take longer to go bad and liquids are chilled while within the box during the duration of the effects. 

At Higher Levels. For every level higher this spell is cast up to 8th level, increase the duration by 8 hours. If cast at 9th level this spell's effects are permanent.