Go Fuckup #1 appending to slice

file.go

package main

import "fmt"

type Box struct {
	ID string
}

type BoxContainter struct {
	box Box
	v int
}

func main()  {
	slice := make([]BoxContainter, 0)
	slice = append(slice,
		BoxContainter{
			box: Box{
				"1",
			},
			v: 1,
		},
		BoxContainter{
			box: Box{
				"2",
			},
			v: 2,
		},
		BoxContainter{
			box: Box{
				"3",
			},
			v: 3,
		},
	)

	slice2 := make([]*Box, 0)

	for _, v := range slice {
		slice2 = append(slice2, &v.box)
	}

	for _, v := range slice2 {
		fmt.Println(v.ID)
	}

	slice2 = make([]*Box, 0)

	for i, _ := range slice {
		slice2 = append(slice2, &slice[i].box)
	}

	for _, v := range slice2 {
		fmt.Println(v.ID)
	}
}