ZactOnly MSPO03-BLACK Magnetic Gym Bag, 46oz Bottle Capacity

The ZactOnly MSPO03-BLACK magnetic gym bag is a compact sling-style carrier with a claimed magnetic attachment and space for a bottle up to 46oz. Its listed capacity is only 1.4 litres, so it is aimed at carrying a bottle and a few small essentials rather than a full gym kit.

At a glance

The listing claims a magnetic design and capacity for a bottle up to 46oz. The bottle is not included.
A back pocket with an SBS zipper and two side pockets are described for smaller items.
An adjustable wide strap and a carry handle offer two ways to carry it.
The listed 1.4-litre volume suits a bottle and essentials, not substantial workout clothing or equipment.

Price

$37.04Save 26%

Reference price: ~~$49.99~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Four listed pockets give separate places for small items such as a phone, keys or wallet.
Low listed weight of 258 Grams and an adjustable strap support light, hands-free carrying.
Customer feedback reports the magnetic attachment works well on fitness machine frames.

Cons

The 1.4-litre listed volume limits it to a bottle and a few small belongings rather than a change of clothes or larger gym gear.
The water bottle is not included.

Technical specifications

11 specifications

Identity
Brand listed in technical details	MSPO
Model	MSPO03-BLACK

Dimensions and carrying
Dimensions	15.2L x 13W x 28H centimetres
Weight listed	258 Grams
Strap length	46 Centimeters
Storage volume	1.4 Liters

Materials and protection
Material	Polyester
Water resistance listed	Water Resistant
Colour	Black

Storage and closure
Pocket count	4
Closure	Drawstring

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title gives a size of 6 x 5.12 x 11 inches, while the dimensions field gives 15.2L x 13W x 28H centimetres. The listing also describes the fabric as water-resistant in some places and waterproof elsewhere, so the level of protection is unconfirmed. The claimed 46oz bottle capacity is not a guarantee of fit for every bottle shape.

What’s in the box

Included

Bag

Who is it for?

A good fit for

Gym users who want to keep a bottle and small essentials close at hand, including on suitable fitness machine frames.
People seeking a small, light carrier for workouts, walks or casual outings.

Less suited to

Anyone needing space for workout clothes, shoes or bulky equipment.
Buyers who need a supplied water bottle or confirmed waterproof protection.

ZactOnly MSPO03-BLACK Magnetic Gym Bag, 46oz Bottle Capacity · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 92 ratings

5 stars83%83%
4 stars9%9%
3 stars4%4%
2 stars4%4%
1 star0%0%

Customer feedback highlights the magnetic attachment, gym use, functionality and fit for a 750ml bottle, with a report of use for casual outings too. That feedback is relevant if you want a bottle-and-essentials carrier, though bottle fit can vary and the listing's 46oz capacity claim is not a universal fit guarantee. Aggregate ratings are mostly five-star, but they do not establish performance for every user or bottle.

Positive themes

Customers report that the magnetic attachment holds well on fitness machine frames.
Feedback describes the size as suitable for a 750ml bottle and the bag as useful at the gym and for casual outings.