diff --git a/pkg/container/container.go b/pkg/container/container.go
index 44efd9e..1638ca5 100644
--- a/pkg/container/container.go
+++ b/pkg/container/container.go
@@ -15,6 +15,7 @@ type Container struct {
 
 func New(opts ...NewOption) *Container {
 	cnrOptions := defaultContainerOptions()
+
 	for i := range opts {
 		opts[i].apply(&cnrOptions)
 	}
@@ -36,7 +37,7 @@ func New(opts ...NewOption) *Container {
 	return cnr
 }
 
-func (c Container) ToV2() *container.Container {
+func (c *Container) ToV2() *container.Container {
 	return &c.v2
 }
 
diff --git a/pkg/container/opts.go b/pkg/container/opts.go
index 424891d..8c15ed1 100644
--- a/pkg/container/opts.go
+++ b/pkg/container/opts.go
@@ -12,11 +12,6 @@ type (
 		apply(*containerOptions)
 	}
 
-	attribute struct {
-		key   string
-		value string
-	}
-
 	containerOptions struct {
 		acl        uint32
 		policy     *netmap.PlacementPolicy