There are hundreds of handheld milk frothers on the market. So what makes a really good one stand out?

Here are some things to look for:

• Revolutions per minute (RPM). This figure, typically between 10,000 to 22,000 for handheld frothers, indicates how many times the device can spin in a minute. However, while many machines tout their high RPMs, a powerful, well-made motor is also important so that the wand will maintain a fast speed when it encounters the natural resistance of liquid. This is why it’s important to stick to well-known brands, with plenty of positive consumer reviews that back up their performance.

It’s a plus when a frother offers multiple RPM or speed settings. These machines can be much more versatile, as they can probably handle mixing liquids other than milk.

• Customer service and warranty. These types of gadgets aren’t known to be particularly long-lasting, but you should expect it to work for at least two years with minimal issues. The brands we feature here have solid warranties and customer reviews praising how the manufacturers went above and beyond to solve any problems.

• Batteries or USB. Most handheld frothers use either AA or AAA batteries, but some — like our Editor’s Pick by FoodVille, for example — are USB rechargeable.

For those that use traditional batteries, we suggest buying rechargeable batteries, especially if you use the frother multiple times a day. The little motor uses quite a bit of energy and, by most accounts, their batteries will run out after 60 to 90 minutes of use.

• Added features. Many devices come with attractive stands or travel cases; some include different attachments like whisks or dough hooks. Additionally, you might find frothers sold as part of full sets with metal pitchers (recommended for frothing) and even stencils and pens for latte art.