Hop over to Amazon and get a Black Friday deal on this Contigo Streeterville Steel Vacuum Insulated 40oz Tumbler. Choose from 5 colors. This is fully leak-proof so you can stay hydrated without the mess while on the move. With double-wall stainless steel vacuum insulation, it keeps drinks cold for up to 29 hours, helping … Continue reading Amazon Black Friday! Contigo Streeterville Steel Vacuum Insulated 40-oz Tumbler $19.99 (Reg. $35) – 5 Colors, Stays Cold for 29 Hours