400ml tempered glass bottle with stainless steel infuser, for loose leaf herbal tea drinkers or those who prefer fruit infused water. Glass Tea Infuser Tumbler has a Stainless Steel Filter. This stylish bottle is made from heat tempered glass to keep your tea piping hot while on the go or keep your ice drinks cold while you are on the go. These bottles are made from heat resistant glass and are perfect for loose leaf herbal tea drinkers with the built in infuser. It also has a strip of thick material to ensure a safe grip and protects your hand from spillages and heated glass. Crafted from heat resistant glass, food grade stainless steel.