Say hello to your new favorite tea travel companion! The Penguin Traveler is glass travel tumbler that comes with a food-grade, removable stainless steel filter, water proof sealed cap and colorful silicon sleeve. Available in 400ml and heat-proof high borosilicate glass. The colorful silicon sleeve provides heat insulation and preservation. The best part about this adorable tumbler? There is extra storage in the cap for more tea on the go!