There are several factors that go into selecting a handheld garment steamer, including heat time, portability, and extra features. Experts suggest choosing a model with more than one steam setting, and a range of other features like crease clips or a bristle brush attachment that can improve the steamer’s effectiveness.Water capacity: The size of a steamer’s water tank is important because it will determine how long the steamer will last when in use. Generally, handheld models have water tanks that are small enough to steam a few items at a time before you need to refill them.