Twitter already offer multiple options to share tweets you like with others. You can retweet it, and you can embed it. You can of course share the link to the tweet as well.
The company is now rolling out a new feature that would let you email a tweet to anyone. The feature lets you add your own comments to the email.
I do not have this feature enabled on my account yet as they are still in the process of making it available to everyone.
Twitter handles the rest. The email contains the tweet information along with image attachments with your comments. The implementation is pretty solid.
The company said:
You can email a Tweet to anyone, whether they use Twitter or not, right from your Twitter stream or from the details view of any Tweet. Just click on the “More” icon next to the reply, retweet and favorite buttons in order to email a Tweet to anyone you know. You can add your own comment, and we’ll send an email with your comment and the Tweet together. Just like that.