Sustainable tea tree pillow: A first for SingaporeToday Australia’s most popular children’s pillow brand, Tetra (est.1949), announced that it is now available in Singapore. Tetra Pillows are uniquely filled with purely natural, organic, Tea Tree Flakes. These are lighter-than-feather, naturally breathable, naturally anti-bacterial and naturally non-allergenic pieces of beautifully fine Australian Tea Tree Paper-bark.