Barista and Co Brew It Stick Coffee & Tea Infuser 5 "Works Really Well" Mr Saunders 02 November 2020 It works really well for tea I have been using it for 3 weeks. After reading reading previous reviews. 1.Small clockwise twist locks it closed. 2. If it floats then it has not filled with water yet - dunk it a bit or give it a few twists to encourage to the water to fill it more quickly. 3. It seems very robust to me so new design has fixed issues. Don't hold the stick when pouring water on as you may scald your hand on steam! I agitate the stick when making tea (I would normally squash a tea bag) to get it to brew faster. If it is locked shut does not open when doing this.