Farbini - 30oz Stainless Steel Double Insulated Tumbler & Straw for Bulletproof Coffee Perfect Coffee Tumbler - Ideal for Bulletproof Coffee - Keeps your coffee hot for hours...up to 5 to be exact. This is KEY for Bulletproof Coffee. Perfect for Iced Drinks - will keep cold drinks cold for 4-6 hours no problem. Sometimes longer depending on the conditions. Like Yeti - but without the price! Why spend upwards of $35 - $50 when you can get this one for less and it does the same thing. Straw Included - this one comes with the coveted stainless steel matching straw. Get it now with this purchase. Double Wall Vacuum Sealed - same as the others and 100% BPA free.