I've created one generic property like this 

  [Display(Name = "Default Products", Description = "Products to put first in the list", GroupName = "Club Package Details", Order = 50)]
        [EditorDescriptor(EditorDescriptorType = typeof(CollectionEditorDescriptor<ProductItemData>))]
        public virtual IList<ProductItemData> DefaultProductList { get; set; } 

 public class ProductItemData
    {
        [Required]
        [Display(Name = "Product Variant", Order = 100)]
        [AllowedTypes(typeof(VariationContent))]
        [UIHint(EPiServer.Commerce.UIHint.CatalogContent)]
        public virtual ContentReference ProductVariantSelection { get; set; }

        [Required]
        [Display(Name = "Min Quantity", Order = 200)]
        public virtual int MinimumQuantity { get; set; }

        [Required]
        [Display(Name = "Max Quantity", Order = 300)]
        public virtual int MaximumQuantity { get; set; }

    }

    [PropertyDefinitionTypePlugIn]
    public class ProductItemDataPropertyList : PropertyList<ProductItemData>
    {
    }

so in CMS, it's showing ID_catalogCommerce so it's very confusing Do we have any way we can show sku/Name ?