> ## Content Index > Fetch the complete content index at: https://www.unknowndivide.com/llms.txt > Use this file to discover other available public pages before exploring further. # Klean Kanteen Classic 27oz: A Simple Steel Water Bottle Done Right - URL: https://www.unknowndivide.com/klean-kanteen-classic-27oz-water-bottle/ - Published: 2024-08-19T15:00:00.000Z - Updated: 2026-10-28T13:09:37.000Z - Description: The Klean Kanteen Classic 27oz is the brand's original stainless steel bottle: single wall, light and narrow enough for a cupholder. With the Flip Seal Sport Cap it becomes a one thumb bottle for runs, rides and hikes. - Author: unknowndivide staff - Tags: Gear *Unknowndivide may earn a commission from purchases made through links in this post.* Not every bottle needs to keep ice frozen for a day. Sometimes you just want something light, tough and easy to drink from that will not leak in your bag. That is the job of the Klean Kanteen Classic 27oz. It is a plain single wall stainless steel bottle, and paired with the Flip Seal Sport Cap it becomes one of the easiest bottles to use on the move. ## Who makes it The Classic comes from [Klean Kanteen](https://www.kleankanteen.com/?ref=unknowndivide.com), a maker of reusable stainless steel bottles, cups and food containers. The company is a Certified B Corporation, and it puts a strong focus on materials. Klean Kanteen says it follows GreenScreen methodology to assess the safety of the chemicals and materials it uses, both for people and for the planet. Klean Kanteen calls the Classic its original stainless steel bottle, designed with quick hydration in mind. ## What the Classic 27oz is The [Classic 27oz with Flip Seal Sport Cap](https://www.kleankanteen.com/products/water-bottle-classic-27-oz?ref=unknowndivide.com) is a single wall, non insulated bottle. Klean Kanteen states that it is made from certified 90 percent post consumer recycled 18/8 stainless steel, and that it is free of bisphenol A (BPA), bisphenol S (BPS), bisphenol F (BPF) and lead. Colored versions use the brand's Klean Coat finish, a powder coat that Klean Kanteen says is four times more durable than its previous paint finish. - Capacity: 27 fluid ounces (800 milliliters) - Weight: 8.4 ounces (238.1 grams) - Size: 10.75 inches tall by 3.41 inches wide - Opening: 1.75 inches (44 millimeters) - Steel: 18/8 stainless steel, 90 percent post consumer recycled - Insulation: none, single wall - Cap: Flip Seal Sport Cap with an included steel straw - Extras: cupholder friendly, dishwasher safe, chip resistant finish ## Why it is cool The Flip Seal Sport Cap is the star. Klean Kanteen describes it as 100 percent leakproof, with an ergonomic spout that opens and closes with a flick of the thumb. You can drink straight from the spout or use the included stainless steel straw. That makes the bottle easy to use while running, cycling or hiking, when unscrewing a lid is awkward. The single wall design keeps the weight down. Insulated bottles are great for temperature control, but they are heavier and bulkier. At 8.4 ounces empty, the Classic is light enough to carry all day. The narrow profile fits most cupholders and bike cages, and slips easily into the side pocket of a backpack. Steel is also a nice material to drink from. Klean Kanteen notes that the bottle will not retain or impart flavors, so water tastes like water even after you have filled it with something else. The 1.75 inch opening is wide enough to add ice cubes and to clean easily. ## How to care for it Klean Kanteen says the bottle is dishwasher safe, which makes care easy. For hand washing, use warm soapy water and a bottle brush, then rinse well and let it air dry with the cap off. Clean the spout and straw regularly, since small parts can collect residue. Because the bottle is not insulated, it is best for water and cold drinks rather than very hot liquids, and the outside will feel the temperature of what is inside. ## Choosing the right Klean Kanteen The Classic line comes in several sizes, and Klean Kanteen offers a range of compatible caps if you prefer a loop cap or a bamboo cap to the sport spout. If you want drinks to stay cold or hot for hours, look at the brand's insulated bottles instead. If you want the lightest bottle for active use, the single wall Classic is the right choice. ## Who should buy it Buy the Classic 27oz if you want a light, durable, leakproof steel bottle for running, cycling, hiking, the gym or the office, and if you care about recycled materials. It is also a good choice for anyone moving away from single use plastic bottles. Skip it if you need insulation to keep drinks cold through a hot day or coffee warm on a commute. The Classic is about low weight and simplicity, not temperature control. **Shop the Klean Kanteen Classic 27oz** [Classic 27oz at Klean Kanteen](https://www.kleankanteen.com/products/water-bottle-classic-27-oz?ref=unknowndivide.com) [Klean Kanteen Classic 27oz with Flip Seal Sport Cap](https://www.amazon.com/dp/B0DK9NS2WR?tag=unknowndivi02-20&ref=unknowndivide.com) [Klean Kanteen Classic 27oz in more colors](https://www.amazon.com/dp/B0DK9NYGNJ?tag=unknowndivi02-20&ref=unknowndivide.com) Comparing bottles? See our [Stanley Classic bottle guide](https://www.unknowndivide.com/stanley-classic-legendary-bottle/), the [Nalgene 32oz Wide Mouth](https://www.unknowndivide.com/nalgene-32oz-wide-mouth-water-bottle/) and the [Kinto Travel Tumbler](https://www.unknowndivide.com/kinto-travel-tumbler-insulated-bottle/). Find more in our [everyday carry hub](https://www.unknowndivide.com/everyday-carry/).