Thermos Vacuum Insulated 18-Ounce Stainless-Steel Hydration Bottle is selling for $13.57 on Amazon; usually runs about $20 at Target.  The reviews are incredible (keeps my water COLD all day; easy to open and close while driving, etc.).   Have to say that the opening and closing aspect of water bottles is what pisses me off – I have enough trouble doing that alone, so can all these people also be texting?