This post will compare four water bottles that are on the market. It can be confusing to know which to buy if you don’t already have a tried and tested favorite. So, here’s my take on Sigg, Klean Kanteen, Blue Q, and Pura. I’m sure there are other brands out there, but these are the ones I’ve used or seen in person.
Sigg

Sigg bottle with sport cap, $19.99
Sigg was the first reusable water bottle that I bought. They’re a Swiss company and have been around since 1908. They have a design for literally everyone’s taste (thus the Hello Kitty example). In terms of sheer number of choices for design, Sigg is the leading water bottle manufacturer.
But besides the aesthetic thrill, I would not recommend Sigg. The openings at the top are small, so they’re extraordinarily difficult to clean unless you buy the special brush. Also, you can’t fit ice cubes in the top. Be careful not to get anything stuck in them. My roommate had a lime wedge that simply would not come out! The lining is made of something funky (not stainless steel) that retains the scent of whatever you put into it, so it’s best to use only for water. Plus side is that you can get one with a convenient sport top with easy access but no spilling.
Pros: lots of design choices, lots of options for tops including sport, fun aesthetics
Cons: hard to clean, retains smell, small opening
Klean Kanteen

Klean Kanteen, $16.45 for 20 oz.
Klean Kanteen is hands-down my favorite of the water bottle options. It has a wide opening, is more durable that Sigg, and doesn’t retain smells. It can fit ice cubes too. It’s made of food-grade stainless steel. Probably has the simplest design of all of the options, so that could be positive or negative depending on your aesthetic preferences. I personally really like the simplicity. (Another similar brand is Enviroproducts. I have a 12 oz one that is perfect for stashing in my purse.
Pros: less expensive than others, durable, easy to clean, doesn’t retain smells, wide opening, comes in several colors
Cons: sport cap is a little bit strange (they might not have perfected this yet), made in China
Blue Q

Blue Q is based in Massachusetts. I discovered them at a small boutique and was intrigued by the colorful designs. They are somewhat like Sigg in their designs, but have far fewer choices. But, I would recommend them over Sigg simply because the bottles are made of stainless steel and have a wider opening. Most of the designs, with the exception of the one on the left, are cheeky-sloganish so it’s not really my cup of tea, but still a fun option.
Their website implies but doesn’t state explicitly that the items are manufactured in Pittsfield, MA. I’d like to know if they are made there or simply distributed from MA.
Pros: stainless steel, interesting designs, doesn’t retain smells, wide opening
Cons: no plain design options, only flat-capped tops available.
Pura

Pura, $17.99
I don’t have as much to say about Pura because I have never purchased one of their products. However, a friend of mine has one and likes it a lot so I’ll do a quick pro and con list. My guess is that they are similar to Klean Kanteen. The colors and feel are definitely alike.
Pros: stainless steel, doesn’t retain smells, wide enough opening, comes in several colors
Cons: no sport top available, made in China