map a keys from an array in a separate arraylist javascript

1const myUsers = [
2    { name: 'shark', likes: 'ocean' },
3    { name: 'turtle', likes: 'pond' },
4    { name: 'otter', likes: 'fish biscuits' }
5]
6
7const usersByLikes = myUsers.map(item => {
8    const container = {};
9
10    container[item.name] = item.likes;
11    container.age = item.name.length * 10;
12
13    return container;
14})
15
16console.log(usersByLikes);