Klean Kanteen created the 64oz wide bottle for two simple reasons: people wanted a mammoth, half gallon bottle for transporting and storing water and other drinks.
Think of it as a filling station that's easy to handle and pour from. On river trips, a sailboat, an all-day picnic or even car camping, use your 64oz Klean Kanteen Wide instead of dealing with big, unwieldy plastic jugs.
The extra wide opening is more than 2 inches in diameter for quick filling, pouring and cleaning, and the universal thread design fits with standard backcountry water filters.
It comes with a Stainless Loop Cap that clips onto a Kanteen S-Biner. Or you can opt for the stylish and functional Flip D-Ring Cap, available as an accessory. Both caps are 100% stainless steel on the inside, so your drinks never touch plastic. In fact, the only plastic on the Klean Kanteen Wide is on the outside of the cap; and of course it's BPA-free polypropylene (pp#5).