Most of the reviews say they actually received a cozi instead of a thermos. What are the chances I get a thermos?
Those reviews are 10+ months old. We can hope the situation has been fixed by now.
Got a koozie 
Aww poop. Make sure you contact CS. Here’s the blurb.
Hi there, if you haven’t already done so please contact Woot! Customer Service. To speed things up, let them know if you prefer a return/refund or a replacement (if possible).
Please allow 24-48 hours for them to respond.
Browser: Use the Woot! Customer Service form.
Woot! App: Choose Account from the bottom navigation and then Support.
Self-Return: Items without Li-Ion batteries can be self-returned within 30 days. Go to your Order Details to get started. The return label will be emailed from UPS.
Note: Woot! Customer Service replies go to the email address on your Woot! account, not your Amazon login email if used/different.
(Please Note: I’m not employed by Woot, but I volunteer to help in the forums.)
Ha!
I just opened mine. Absolutely wrong item. No lid. No handle. Just an empty vessel, perhaps insulated, but useless for taking any kind of drink with you.
This is the kind of thing that pisses me off about Woot. Even knowing this problem with this item for over a year via returns and reviews, they just keep dumping them off anyway.