Coolflask 64 oz Insulated Stainless Steel Water Bottle

The Coolflask insulated water bottle is a large-capacity stainless-steel jug supplied with straw and spout lid options. Its half-gallon size and carrying strap suit buyers who want fewer refills, though the weight and mixed reports about strap durability and leakage are worth considering.

At a glance

Two lid styles are listed: a straw lid for sipping and a spout lid for drinking directly.
The listing claims cold retention for 48 hours and hot retention for 24 hours.
The product description advertises a shoulder strap for carrying.

Price

$35.99Save 10%

Reference price: ~~$39.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

The two lid options give buyers a choice between straw sipping and a spout.
The stated half-gallon capacity can reduce refill frequency for people who need to carry a large drink supply.
The listing describes double-layer stainless-steel vacuum insulation.

Cons

A filled half-gallon bottle is a substantial item to carry, so its size may be less convenient for compact bags or light travel.
Customer feedback is mixed on strap durability and leakage, despite the listing's leak-proof claim.

Technical specifications

11 specifications

Identity
Brand	Coolflask
Model	water bottle

Materials and care
Material	Stainless Steel
Care instructions	Dishwasher Safe, Hand Wash Only
Color	Agate Green

Dimensions and handling
Dimensions	5"W x 10"H
Weight listed	0.89 kg
Carrying feature	Carrying Loop, Cold 48 Hours

Lids and use
Cap type	Straw Lid &Spout Lid
Recommended uses	Coffee, Juice, Soup, Tea, Water
Age range	Adult

What to know before buying

Listing details to confirm

The title claims 64 oz capacity, while the details field lists capacity as "4 pounds," which is a weight rather than a volume. The listed 5-inch width and 10-inch height may also not establish the overall size of this large-capacity jug. Care instructions say both "Dishwasher Safe" and "Hand Wash Only." Confirm capacity, cleaning guidance, and dimensions for the selected listing before buying. The stated temperature-retention and leak-proof performance are listing claims, not independently verified results.

What’s in the box

Included

Spout lid
Straw
Straw lid
Brush

Who is it for?

A good fit for

People who want a large insulated bottle and prefer choosing between straw and spout lids.
Buyers who value a carrying strap and are comfortable transporting a bulky bottle.

Less suited to

Anyone prioritizing a compact, lightweight bottle or relying on the strap for rough or frequent carrying.
Buyers who need confirmed dishwasher-only or hand-wash-only guidance, or an unambiguous capacity specification.

Coolflask 64 oz Insulated Stainless Steel Water Bottle · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 1,206 ratings

5 stars76%76%
4 stars9%9%
3 stars7%7%
2 stars2%2%
1 star6%6%

Customer feedback highlights perceived build quality, temperature retention, appearance, portability, and the carrying strap. Some customers report cold drinks lasting up to 48 hours, which aligns with the listing's claim but does not verify it. Strap durability and leakage receive mixed comments, so buyers carrying a full, heavy jug should weigh those concerns against the convenience of its large stated capacity. Aggregate ratings lean positive overall, but do not resolve these specific mixed experiences.

Positive themes

Customers report positive impressions of build quality and temperature retention.
Customers mention the appearance, portability, and carrying strap favorably.

Mixed feedback

Feedback is mixed on strap durability, including reports of breakage as well as sturdiness.
Reports differ on whether the bottle leaks.

Frequently asked questions

What lids are listed with this Coolflask bottle?

The included-components listing names a straw lid and a spout lid, along with a straw and a brush.

How long does the listing claim it keeps drinks cold or hot?

The title claims cold retention for 48 hours and hot retention for 24 hours. These are listing claims rather than independently verified results.

Is the capacity clearly specified?

No. The title calls it 64 oz and half gallon, but the details field says "4 pounds." Confirm the selected listing's capacity before purchase.

Can it go in the dishwasher?

The care field gives conflicting instructions, saying both "Dishwasher Safe" and "Hand Wash Only." Confirm the correct cleaning guidance before buying.