Awesome! I love the first one by @iamjadeline, I have 2 suggestions:

1. Don't have information running sideways on the front of the shirt. Reason being, we want people to be able to read this easily and not have to turn their heads. I would suggest either running the writing 'steemit, team malaysia' horizontally across the bottom of the shirt or across the shoulders at the back.
2. Perhaps also have the steem logo on the sides of the sleeves so you can see it side on. Maybe this could be the regular logo, without the Malaysia flag inside.