Coolflask MegaSip Insulated Water Bottle, stainless steel with straw lid

The Coolflask MegaSip Insulated Water Bottle is a stainless-steel flask with a straw lid, carry handle and triple-layer vacuum insulation. Its wide mouth is intended to accommodate ice and cleaning, while the included straw brush supports care of the drinking tube.

At a glance

The listing describes triple-layer vacuum insulation and claims drinks stay cold for over 24 hours.
A widened straw and larger spout are intended to provide a direct drinking flow without tilting the bottle.
The buttonless pop cap has a folding carry handle that the listing says helps prevent accidental opening when folded down.
The listing describes a wide mouth for adding ice and cleaning, and states that the bottle is dishwasher safe.
The manufacturer claims the bottle is leakproof, BPA-free and made from food-grade 18/8 stainless steel.

Price

£20.39Save 15%

Reference price: ~~£23.99~~

Price checked: 14 Nov 2026

View offer Ahead of Black FridayExplore the selection

Pros and cons

Pros

Straw lid, two straws and a straw brush are listed as included, supporting drinking and straw cleaning.
The folding handle offers a built-in carrying option without requiring a separate carrier.
Dishwasher-safe care is claimed, and the wide mouth is intended to make filling and cleaning easier.

Technical specifications

13 specifications

Identity
Brand	Coolflask
Model	MegaSip Insulated Water Bottle
Colour	Crimson Cobalt

Construction and dimensions
Material	Copper Plating, Stainless Steel, Vacuum Layer
Dimensions (W × H)	9.5W x 31H centimetres
Lid	MegaSip Straw Lid
With lid	Yes

Use and care
Recommended uses	Coffee, Juice, Soup, Tea, Water
Age range	Adult
Care instructions	Dishwasher Safe
Special features	Ergonomic Design, Keep Cold over 24 Hours, Leakproof, Shatter Resistant, Triple Layer Copper-Plated Vacuum Insulated

Other details
Country of origin	China
Number of packs	1

What to know before buying

Listing details to confirm

The listing gives the capacity as “1.13 kg” in its capacity field, while the title calls it 1.2L. These are inconsistent capacity details, so confirm the usable volume before buying. Temperature retention and leakproof performance are manufacturer claims, not independently verified here.

What’s in the box

Included

2 straws
MegaSip Straw Lid
Straw brush

Who is it for?

A good fit for

Adults wanting a large-format insulated bottle with a straw lid for work, exercise or outdoor use.
Buyers who value a carry handle, wide mouth and dishwasher-safe care claim.

Less suited to

Buyers who need a clearly confirmed liquid capacity before purchase.
People seeking a supplied hot-drink lid or a drinking option other than the straw lid, which is not specified here.

Coolflask MegaSip Insulated Water Bottle, stainless steel with straw lid · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 108 ratings

5 stars74%74%
4 stars14%14%
3 stars2%2%
2 stars5%5%
1 star5%5%

Customer feedback highlights perceived good quality, temperature retention, leak resistance, sturdiness and functionality, with value and design also mentioned positively. These reports may matter to buyers using the bottle throughout a workday or workout, but they do not verify the listing’s over-24-hour cold-retention or leakproof claims. Aggregate ratings lean positive overall, while a smaller share of ratings are low, and the supplied feedback does not explain why.

Positive themes

Customers report positive impressions of quality, temperature retention and leak resistance.
Sturdiness, functionality, value, the included straws and design are also mentioned positively.

Frequently asked questions

What is the bottle’s capacity?

The title says 1.2L, but the capacity field says “1.13 kg”, which is not a liquid-volume figure. Confirm the actual capacity with the selected listing before ordering.

What comes with the bottle?

The listed contents are two straws, a MegaSip Straw Lid and a straw brush.

How long does it keep drinks cold?

The manufacturer claims triple-layer vacuum insulation keeps drinks cold for over 24 hours. This is a listing claim rather than an independently verified result.

Can it go in a dishwasher?

The listing says the bottle is dishwasher safe. Follow any care guidance supplied with the selected product.