Zojirushi Tuff Slim 17-Ounce Stainless-Steel Vacuum Bottle

This product is good but not excellent. The reason is that it's Teflon lined which is not heathly for you. Also, it's doesn't keep liquids hot as I was used to when using my other bottle (it broke). It's not bad and it's certainly better than Sigg bottles for instance but I like my liquids to stay hot; not warm. It helps though to put hot, boiling water in the bottle before putting coffee in it but who has time for that.

I needed a high quality thermos due to my workgroup moving to a building where the on-site food vendor has an insane policy of not allowing patrons to use their own mugs to dispense his decidedly average coffee. (Well, you can pay the he wants as he "doesn't know how big your mug is".)I read many of the reviews here, and decided the negative reviews were bunk. After receiving the Zojirushi, my opinion of those reviewers giving 1 or 2 stars is that they are either silly, can't read basic instructions, or ignorant of basic physics.1. The instructions that come with the product CLEARLY state how to clean the unit, including removal and care of the gasket. Read the manual ... it's a whole page long, so yeah, I realize that's a lot to ask.2. This model is NOT a "sippy cup" -- not sure why someone would complain about a feature that clearly wasn't part of the design. The spout design, however is rather clever and works like a charm.3. This bottle keeps stuff hot. Before using it the first time, I rinsed with hot tap water, then filled it with water at the maximum temperature out of my faucet, a scalding 136F. Over four hours later, the temp had dropped all to 133F. In the morning, after 14+ hours, the water measured 110F. Passed with flying colours.This morning I loaded it up with fresh press-pot coffee. Throughout the morning the coffee stayed hot as I poured helpings into the bottles cap. Only when I returned to do some work from home was the last 1/2 capful was the temp below par. For several hours there had been far more air than liquid in the bottle. Those who say this bottle doesn't keep things hot may have experienced this phenomenon and not really thought about basic physics.Obviously after one day I can't comment on longevity. But I'm pretty sure this bottle will be a companion for a long time. Take that, Coffee Nazi.--------------------------------------Update: Nearly three months later and I am still pleased with this bottle. It has performed well and I use it every work day. I will buy more Zojirushi products.

I came to regard Zojirushi brand due to their leadership position in the bread machine market. I also have much family that use their rice cookers with satisfaction (I still have a Tiger). However, I understand they started with vacuum flasks first. These flasks were invented by Dewar in Scotland but Thermos in Germany patented them and Dewar lost the suit to regain patent rights. Today, Thermos quality is across the board. I'm sure they make some good and some not so good. This Zojirushi isn't the best Japanese craftsmanship, but it's a product outsourced to Thailand. Still, I found it satisfactory. Most importantly, it kept liquid hot.I preheated it with boiling water, then filled with boiling water. I measured the temperature of the just-filled flask with a Fluke infrared thermometer. It was 175F. This is as hot as practical at my high altitude, higher temperatures would require pressurization. I closed the flask and let it sit upright for 12 hours overnight in temperatures that dipped from 69 to 63F. I measured 154F when the flask was opened. It cooled slightly when I poured it in the cup but it was sufficiently hot for coffee or tea. Adding cold cream or milk would lower temperatures and reduce the effective storage time. It should still be good for 8 hours.The fit and finish seem good. The flask appears to be entirely stainless steel. The lid is plastic with rubber-like seals and opens and closes without putting a finger on any surface contacted by the drink to keep it sanitary. The outer cap is stainless but has a plastic liner. The plastic appears to be hygrophobic -- liquids bead and shed easily so there is very little residual film in the cup after it's emptied. It performs well but I still might prefer a completely stainless steel cup since I don't like to drink out of plastic. Besides the hygrophobic feature, the plastic allows for reliably working threads to be formed inside the cup for attachment to the flask at low cost compared to machining them on thicker metal. The plastic may also insulate the hot beverage from your hand.I haven't had any problems with leaks or dribbling. Overall, it seems quite good.Update: I have two of these now and alternate between the two so I can always have a clean one ready to go when the first one is emptied or being washed. Needless to say I use them daily. They keep my coffee hot most of the day. By evening it's more warm than hot because popping it open and half-emptying it throughout the day results in it filling halfway with room-temperature air each time and that kind of cools it off especially as it gets nearer to empty since there's much less hot mass in there to maintain the temperature. I also take them camping on short overnighters, one with coffee and the other with hot chocolate for the kids. They're holding up well and continue to give good service.

this vaccuum bottle is horrible! perhaps i got an irregular one, but it keeps my water hot for only about 2 hours.