LifeWheel Cute Office Tea Cup Creative Travel Mugs Borosilicate Glass Penguin Tumblers,Blue(B Style) &hearts; Packaging:1 x Borosilicate Glass Cup &hearts; Cup body material: Food grade borosilicate glass &hearts; Small and portable,Leak proof seal &hearts; Into the backpack,Will not leak,anytime can use &hearts; Cup lids built storage space,dry tea can carry it,designed specifically for tea lovers