What material is the inside of the lid made of? So many lids are plastic inside. Silicone would be acceptable.
180274
It's actually stainless steel. I'm not sure what connects the stainless steel to the plastic on the outside. I'm going to assume a silicon but I'll update my answer when I don't leave it at work!
180275
The inside surface of the Wide Loop Cap lid (the cap that comes standard) that contacts the contents of the Klean Kanteen is made of two materials: most of it appears to be the same Stainless Steel that the body of the Klean Kanteen is made of; the other part is a gasket that seals against the lip of the body. On the Klean Kanteen website I couldn't find what that gasket is made of, but it appears to be silicone or plastic; however, very little of the contents will be touching that gasket. I'm not sure of the construction of the other lid types, but you can go to http://www.kleankanteen.com/products/insulated/klean-kanteen-insulated.php to find out the specs. The inside surface of the Wide Loop Cap lid (the cap that comes standard) that contacts the contents of the Klean Kanteen is made of two materials: most of it appears to be the same Stainless Steel that the body of the Klean Kanteen is made of; the other part is a gasket that seals against the lip of the body. On the Klean Kanteen website I couldn't find what that gasket is made of, but it appears to be silicone or plastic; however, very little of the contents will be touching that gasket. I'm not sure of the construction of the other lid types, but you can go to... » Read More The inside surface of the Wide Loop Cap lid (the cap that comes standard) that contacts the contents of the Klean Kanteen is made of two materials: most of it appears to be the same Stainless Steel that the body of the Klean Kanteen is made of; the other part is a gasket that seals against the lip of the body. On the Klean Kanteen website I couldn't find what that gasket is made of, but it appears to be silicone or plastic; however, very little of the contents will be touching that gasket. I'm not sure of the construction of the other lid types, but you can go to http://www.kleankanteen.com/products/insulated/klean-kanteen-insulated.php to find out the specs. « Show Less
180276
The gasket is medical grade silicone, it is removable to clean thoroughly, although it is somewhat hard to remove and replace it can be done with a flat, slender, round edged metal tool like this Tweezerman No-Slip Skin Care Tool
180277
The inside of the lid is stainless steel but the outside of it is a type of plastic
180278
The inside of the standard lid (or at least the part that will touch the liquids) is stainless steel.
2001053
The lid is made of ventilated microwaveable plastic. I have used this bowl and plastic top in the mocrowave and it works just fine.
2236985
Hi Don-the interior portion of the cap is made from BPA-free polypropylene with a food grade silicone seal. All materials were thoroughly researched and tested before being selected. Hope this helps.
1393760
According to research it is silicone. I've used mine very often and not a single problem.
312649
It does have a metal underside, so the food wouldn't touch any plastic. Not sure what the lid is made of, but it is a hard plastic. My kids don't love this...they say there is always water in their lunch from it. My friend uses these all the time for her kids and they say they never noticed that. Hope that helps.
192083
It's possible it could be mad of silicone. It's a very thin plastic material but it works great for me. The only downside I have noticed is the cover shield when you are in the sun is kind of hard to see it, but it doesn't take much to open it up if you need to
1848737
How does one know the difference? I can say that the red parts (flat lid, edges around the side) are plastic. But, the portion that "pops open", the opaque sides, are a flexible plastic. It could be silicone, but I don't know how to determine.
1048136
It's all metal inside except for two very small silicone "plugs" where the water level is measured on the outside of the unit. The lid is plastic. I love it!
2206229
Lids are made from BPA-free polypropylene and have a silicone seal. Ideal situation, of course, would be no plastic. But as long as the food rests safely in the glass portion, it's about as good as it gets. Wean Greens and Glasslocks are simply awesome!
1837447
The lid is made of sturdy translucent plastic, with a rubber O-ring (about the thickness of my pinkie finger) that seals the lid against the glass.
136386
The lids are plastic. I never thought to look and I threw the packaging away. Did you try emailing the company? I am otherwise very happy with them. Great size.
1070368
The inner seal seems to be the usual "rubber" seal. I don't know, because they do not say. I would guess that it is a man made material, just because real rubber is not used much any more.The seal does seem to be the usual seal that you would see in any lid with a seal.
2059855
The lids are plastic - they will melt in your food. Do not put them in the over. I also had one smaller dish explode in the oven and drop glass into the other food I was cooking. Not a good time - except that I did end up having dinner at Chipotle. Have had no other problems with the cookware.
2145479
Silicone is food safe and much less toxic than plastic. I am looking for a cup with a silicone lid!
812554
The lid is plastic (with a seal); the green part that wraps around the ceramic is silicone.
812555
The lid is plastic with a silicone sealing ring. I bought two of these mugs and the mugs themselves are great, but, I don't like the lids. One lid came with a broken seal and the other lid seals fine but is difficult to drink from.
1389449
There is a version of this product that is glass, and the lids fit them, but this product is plastic and should not go in an oven.