>>297291086
For rendering, GPU instancing is applied by material, not by mesh, so it'll work fine with fbx meshes as long as you check the "GPU instancing" box in the shader.

 If you're talking about adding colliders to all the beers though, you're probably thinking of prefabs. You'll want to create a prefab variant to add your collider in, then make sure all the beers are using the same prefab.