A shade of the Owala Stainless Steel Tumbler is quietly 20% off right now at Amazon. Reviewers love that the cup holds lots of water and fits in car cupholders. Stanley lovers, prepare to be ...

while the Stanley IceFlow Tumbler is built from a stainless steel material and, per the brand, can keep drinks iced for up to two days. Each one also comes in a wide variety of color options ...