If you make your own spice blends and dry rubs, you are going to need a spice shaker.

Many of them allow you to adjust the holes being used to get that even application. Look for shakers that allow you to label the contents and/or have a viewing window. 

Spice shakers are perfect for spicing biltong or applying your freshly made dry rubs to roasts:

If you don’t need adjustable hole sizes and you have some empty spice containers, you can always refill them with your spice blends.

Look for containers that have the hole sizes you need and a removeable lid:

Enjoy,

PK

Here are some more posts about spices and must have kitchen kit: