This paint rack from Miniaturicum can contains a lot of paint pots of all types (GW, Reaper, Vallejo, etc).
As you can see, this rack is suited best for GW type of pots but can also work for dripper bottles, pots of glues, etc. This in my opinion is the greatest advantage of not having specific holes designed for each pot. This type of rack is a lot more versatile than other ones than can be found on the market (and also very cheap!)
The rack comes in separate parts (and an assembly guide) and the assembly is very easy. You can even choose not to glue the pieces if you'd like (that is what I've done for the moment):