Stainless steel water bottles made by a high quality tin can making machine be available in a range of shapes and sizes from bottles that are little enough to fit quickly in a pocket or handbag, to large models that will hold well over a liter. There are also a number of colors offered and some bottles feature graphics lithographed on the outside. Graphics are great, but think about a neoprene or other sleeve for the bottle considering that typical usage can trigger scratches that will mar even the very best graphics.
Why are double-walled bottles important? Many bottles are single-walled, which indicates that they are made from a single layer of stainless steel. Others are double-walled, implying that they are really two bottles, one inside the other, that are bonded together. Typically, the air within the area in between these two bottles is extracted to produce a vacuum. That is all a vacuum bottle is, an inner and outer liner, with all the air drew out of the empty space between.
Vacuum insulation has long been used in bottles created to bring coffee or soup, and it was natural that this superior insulation system would migrate to bottles designed mostly for drinking water. Vacuum insulation can help keep drinking water cold all day long, which is far superior to what a plastic bottle can do.
Lots of producers have actually listened to their consumers and started offering various caps and lids that can be interchanged amongst a lot of the different bottles that they make. The benefits of this are apparent: replacement caps are easy to get, and the variety of available caps for each bottle is increased. Caps are normally made of food grade polypropylene, and be available in a number of primary designs that a lot of producers provide.
The most typical is one with a small spout that may be activated by bring up on a small cap, or by pushing a button. Another typical variety is a straight cap, with no sipping ports. This kind of cap should be entirely gotten rid of in order to drink or pour from the bottle.
Another issue when picking a stainless-steel water bottle made by a high quality tin can making machine is the liner. The majority of these bottles are medical or food grade stainless steel on the inside with no plastic or epoxy finishes that may touch the drinks inside. A couple of manufacturers, however, utilize either a plastic or epoxy finish on the within the bottle. This is more common with aluminum bottles, but it does happen with stainless bottles periodically. If the purpose of the bottle is to prevent the use of plastics and chemicals, then buying a bottle with a plastic covering on the within makes little sense.
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