Bamboo Double Wall Tea Infuser Bottle 420mlBamboo Double Wall Tea Infuser Bottle 420ml. Includes quality Stainless Steel dual tea infuser basket that clicks into bottle and is easily removable. Double wall steel insulation keeps your drinks hot or cold for up to 12 hours. How to use: Unscrew top of infuser basket and put your loose tea, fruits or teabag inside, then screw top back on. Click infuser into bottle, add hot or cold water and allow your tea or fruits to deliciously infuse.