I once met a chap who swore by classic SIGG metal bottles because, he said, he could thrust them into a fire and warm up his drink when it was cold. Pretty clever, if somewhat the road to burnt hands, and definitely an advantage over plastic bottles.
But why go to all that fuss unless you're in a survival situation (or a pyromaniac), when you can just make a nice pot of tea at home and decant it in to one of SIGG's Thermo Bottles, and keep it warm all day?
We've had two sizes on test for the last couple of months, the 1L and the 0.5L. They're slightly different in design, so we'll start with the 1L bottle first.
The 1L bottle is a tall, thin affair which is quite elegant and sits nicely inside a 25L backpack. It has a cup which it snugly nestles inside, and both the cup and the bottle have a rubber patch on the bottom so they don't slide off a car dashboard or move around on a boat. SIGG say that the cup can be attached to the top of bottom of the bottle, but on my sample the cup is a little loose to stay securely on the top. It is nice and secure on the bottom though.
The 1L features a double screw-on top which allows a wide opening for filling the bottle, and a narrower one for pouring the contents in to the cup. Both are leakproof with silicone o-rings, and even a hard shake doesn't induce a leak. It also has a groove on the stopper so that you can dispense soup/drink and not expose the rest of the contents to the cold and rain.
The 0.5L version has a different top to it, which is designed to allow you to pour drinks in to a cup, or drink straight from the bottle. It has an ingenious perforated steel opening which means that even with the lid off if you shake the bottle it won't spill. It will, however, pour through easily if you tip the bottle. Clever stuff.
Both bottles have the classic SIGG style handle, which doubles as a leverage device so you can open the bottle using a stick if you have cold hands or limited dexterity.
The bottles are made from Stainless Steel, and are painted in sexy white. I've managed to drop both of them (clumsy oaf) and add some character-giving dents here and there, but a similar drop would probably have smashed a plastic bottle.
Price wise, they're both pretty good value for a rugged steel bottle. Neither of each size is cheap, but then they're not 'cheap' to use either. If you see what I mean.