Hop over to Woot and get a deal on this Contigo Streeterville Steel Vacuum Insulated 40oz Tumbler, Reef. 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 you keep cool when the … Continue reading Contigo Streeterville Steel Vacuum Insulated 40-oz Tumbler $16.35 (Reg. $35) – Stays Cold for 29 Hours – SAVE 53%