Large Reusable Glass Travel Cup with Loose Tea Infuser and Smoothie Filter. SoleCup’s original reusable tea cup….supersized. This barista friendly large travel mug is made from tempered glass, with detachable loose tea infuser and smoothie filter to maintain a premium drinking experience on the go. It’s screw on splash-proof lid will save you from sticky cups and spills. This travel cup can be used for coffee, loose tea and smoothies.