StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai
1
18oz Classic with Flip Seal Sport Cap

18oz Classic with Flip Seal Sport Cap

4.7(474 ratings)

Best price now

$19.95at Klean KanteenChecked 7 h ago

Prices are checked against each store and labelled with when.

Visit Klean Kanteen

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Lowest price today: $19.95 at Klean Kanteen (checked Nov 15, 2026).

Our take on the 18oz Classic with Flip Seal Sport Cap

The Klean Kanteen 18oz Classic is a single-wall, non-insulated stainless steel bottle with a leakproof Flip Seal Sport Cap. It is built from certified 90% post-consumer recycled 18/8 steel with a chip-resistant Klean Coat finish, and its narrow profile makes it easy to grip and pack. The flip spout opens with a thumb flick and works with or without the included stainless steel straw. It suits runners, cyclists, hikers and kids who want a light bottle, not a heavy insulated one. Against double-wall rivals it keeps drinks cold far less well and can sweat, but it is lighter and simpler to carry. Owners rate it highly for the leakproof cap and easy one-handed drinking.

Best forRunners and cyclists who want one-handed sippingHikers and gym-goers packing lightKids and adults who prefer a slim bottleBuyers who want recycled stainless steel
Pros
  • Leakproof Flip Seal Sport Cap
  • Spout opens with a thumb flick
  • Works with or without the straw
  • Light and slim for easy packing
  • Made from 90% recycled 18/8 stainless steel
  • Chip-resistant Klean Coat finish
Cons
  • Single-wall, so it does not insulate
  • Can sweat with cold drinks
  • Not for hot beverages
  • Straw needs regular cleaning

18oz Classic with Flip Seal Sport Cap prices at every store

  • Klean KanteenNew

    In stockReturn policy

    $19.95Checked 7 h ago
    Visit Klean Kanteen

What reviewers say

  • 4.7 / 5474 ratings

Owners rate the bottle highly, praising the leakproof cap and easy one-handed drinking. The main complaints are that it does not keep drinks cold and can sweat.

What people mention
  • Leakproof capPraisedOwners say the Flip Seal cap does not leak in bags or packs.
  • One-handed usePraisedReviewers like flicking the spout open with a thumb while moving.
  • InsulationCriticisedBuyers note the single wall does not keep drinks cold for long.
  • CondensationCriticisedCold drinks cause sweating on the outside of the bottle.
  • BuildPraisedOwners describe the steel and coating as durable and chip-resistant.
  • CleaningMixedSome find the straw and spout harder to clean than a plain bottle.

About the 18oz Classic with Flip Seal Sport Cap

The 18oz Classic is a stainless steel water bottle for kids and adults. It has a single-wall, non-insulated design that is lightweight and small, so it is easy to bring anywhere. The narrow profile makes it easier to grip, pack and carry.

The bottle is made with certified 90% post-consumer recycled 18/8 stainless steel. It has a chip-resistant, durable Klean Coat finish.

The Flip Seal Sport Cap is 100% leakproof. Its ergonomic spout opens and closes with a flick of the thumb. The cap can be used with or without the included stainless steel straw. The bottle suits running, biking, hiking and fitness.

Capacity
18 oz
Material
18/8 stainless steel, certified 90% post-consumer recycled
Finish
Klean Coat, chip-resistant
Insulation
Single-wall, non-insulated
Cap
Flip Seal Sport Cap, 100% leakproof, ergonomic spout
In the box
Bottle with Flip Seal Sport Cap, stainless steel straw

Questions and answers

Does this bottle keep drinks cold?
No. It is single-wall and non-insulated, so it does not hold temperature like a double-wall bottle. It is meant for quick hydration, not all-day cold.
Is the Flip Seal cap really leakproof?
Yes, the cap is described as 100% leakproof. Owners report it staying sealed in bags.
Can I use it without the straw?
Yes. The sport cap works with or without the included stainless steel straw.
Is it good for hot drinks?
No. A single-wall bottle gets hot on the outside with hot liquids, so it is best for water and cold drinks.
How does it compare with an insulated bottle?
It is lighter and slimmer but does not insulate. Choose it for carrying ease; choose a double-wall bottle to keep drinks cold.
What is included?
The 18oz bottle, the Flip Seal Sport Cap and a stainless steel straw.
Where is the 18oz Classic with Flip Seal Sport Cap cheapest?
At Klean Kanteen, for $19.95, as of our latest check.
What do buyers say about the 18oz Classic with Flip Seal Sport Cap?
Rated 4.7 out of 5 from 474 ratings.

More water bottles

  • T
    Tal 20oz Stainless Steel 2-in-1 Straw and Chug Water Bottle with Push Lid
    Tal 20oz Stainless Steel 2-in-1 Straw and Chug Water Bottle with Push Lid
  • B
    b.box Insulated Drink Bottle 500ml
    b.box Insulated Drink Bottle 500ml
  • B
    b.box 12oz Lemon Sherbet Insulated Drink Bottle
    b.box 12oz Lemon Sherbet Insulated Drink Bottle
  • F
    Frost Buddy Bottle Buddy
    Frost Buddy Bottle Buddy
  • K
    Klean Kanteen Insulated Classic Kid Sport Cap Bottle
    Klean Kanteen Insulated Classic Kid Sport Cap Bottle
G
Gatorade Rookie Stainless Steel Water Bottle
Gatorade Rookie Stainless Steel Water Bottle
  • I
    ION8 Leakproof Water Bottle
    ION8 Leakproof Water Bottle
  • T
    Tal 24oz Stainless Steel 2-in-1 Straw and Chug Water Bottle with Push Lid
    Tal 24oz Stainless Steel 2-in-1 Straw and Chug Water Bottle with Push Lid