I review coffee makers for a living and these 47% off Keurig Prime Day deals are not to be missed

The Keurig K-Express Single-Serve K-Cup Pod Coffee Maker comes in five different colors and has a 42-oz removable reservoir that makes refilling super easy. It offers 3 different drink sizes and is one of Keurig's most compact models. At 45% off for Prime Day, it's the cheapest Keurig you can buy right now.

Reduced by 31% this Prime Day, the Keurig K-Mini Single-Serve K-Cup Pod Coffee Maker comes in black, pink, green, blue, and gray. It's under 5 inches wide and can fit a travel mug up to 7 inches tall under its spout, making it great for busy students or professionals who need speedy coffee they can take and brew anywhere.

The Keurig K-Slim Single-Serve K-Cup Pod Coffee Maker is the best value pick in our buying guide, and now it's nearly half-off for Prime Day, down by 47%. It's got an energy-efficient auto-off feature that automatically shuts the machine off after five minutes of non-use, and it's also got a 46-oz reservoir, which can brew four cups between refills.

As the name suggests, the Keurig K-Iced Coffee Maker is suited to making cold drinks by brewing at a lower temperature, which is ideal for those hot summer days when you don't want a watery iced latte. It's also got a Strong Brew setting.

The Keurig K-Elite Single-Serve K-Cup Pod Coffee Maker is one of Keurig's most popular machines. In our K-Elite review, it scored 4.5 stars and used to sit at the top of our buying guide due to its speedy brew times and handy brew-ahead setting, which allows you to schedule the machine ahead of time. At under $99, it's an outstanding saving at 47% off.

As the name suggests, the K-Supreme is one of Keurig's best coffee makers. It's got MultiStream technology, puncturing K-Cups in a number of points to extract the flavor from every last coffee ground. In our review, it scored 4 stars, and we praised its ability to make no-frills, flavorful coffee.

This ultra-capable Keurig machine is now just $150 for Prime Day, thanks to a $70 saving. When we tested the K-Duo Hot & Iced, it got top marks for versatility thanks to its three brewing options, but it also features MultiStream technology, which guarantees a tastier brew from every K-Cup.