To choose the best microphone capsule for your equipment, start by narrowing down the selection based on what that equipment is. For example, if you're swapping capsules on a Zoom H6, some suggestions include the Zoom SGH-6 Shotgun Microphone Capsule, Zoom MSH-6 MS Capsule and Zoom XYH-6 X/Y Capsule. Proprietary capsules for certain studio and broadcast mics are available as well, including the BLUE B5 Pressure Omni Small Diaphragm Bottle Cap, B6 Cardioid Dual Backplate Bottle Cap and others from BLUE's Bottle Cap series.
On the other hand, if you're looking for a capsule that can attach to any standard wireless microphone, those are also easy to find. One great example would be the Telefunken M 80 Wireless Head, which was originally designed for touring use by Green Day - though it's a solid choice for musicians of any other genre, too. And that's just one of many capsules you can explore with a few minutes spent looking through this section.
Lots of the top microphone brands are represented here, from Sennheiser and Neumann to Beyerdynamic and Audio-Technica. So if you have a preferred label, you'll probably appreciate the freedom to pick up a capsule that carries it! When all is said and done, the perfect option for your needs is up to you to decide, whether that means having a whole collection of microphone capsules ready to swap or a single versatile one that can handle everything you care to throw at it.