WEBGlass Tea Cup with Infuser and Lid,500ml (17oz) Borosilicate Glass Tea Mugs for Loose Leaf Tea,Glass Tea Cups with Filter for Black Tea,Great Loose Tea-leaf Brewing System. 4.4 out of 5 stars. 228. 800+ bought in past month. $10.99 $ 10. 99. FREE delivery Mon, Jul 29 on $35 of items shipped by Amazon.