You touch a Small or smaller object or container that contains objects, slowing the passage of time for that object to half its usual pace. Food takes twice as long to spoil, a torch burns twice as long, a lamp consumes 1/2 as much oil, ice melts half as fast, etc. This effect lasts until you use the effect again, until the object changes state (such as food being eaten), or 1 day passes (at which time you can use the spell again to maintain it). This does not affect the items interactions with the world (such as a weapon being preserved in this way would not swing slower).