.Vacuum Insulated Stainless Steel Tea Tumbler with Infuser. TherMax double wall vacuum insulation for maximum temperature retention. Unbreakable 18/8 stainless steel interior and exterior withstand the demands of everyday use. Leak-proof travel cover seals closed for carefree portability. Separate infuser and drink lids let you brew and enjoy, all in one container. Infuser lid lets you brew tea right in the tumbler. Splash resistant drink lid lets you enjoy any beverage on-the-go. Tumbler stays