OFFCUP Jelly Number 1 Foil Balloon

OFFCUP Jelly is a foil number 1 balloon intended for birthday and other party decorations. The listing claims a 40-inch size and self-sealing valve, with inflation by air or helium and the option to deflate and store it for reuse.

At a glance

A number 1 design in the Jelly colour variant, for birthdays, weddings, anniversaries and other party décor.
The description claims 40 inches (101 cm), while another specification lists flat item dimensions of 17.6 x 14.8 x 0.2 centimetres.
The self-sealing valve is described as closing after inflation. The listing recommends pinching it to help prevent air leakage.
The included straw is described as suitable for inflation and deflation, allowing the balloon to be folded and stored for reuse.

Price

£2.96Save 15%

Reference price: ~~£3.49~~

Price checked: 13 Nov 2026

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Pros and cons

Pros

Large-format number decoration, if the claimed 40-inch inflated size suits the display.
Can be filled with air or helium according to the listing.
Deflation and storage for reuse are described, rather than single-use disposal.

Technical specifications

7 specifications

Identity
Brand	OFFCUP
Model	Jelly

Dimensions and installation
Dimensions listed	17.6 x 14.8 x 0.2 centimetres

Design and use
Number theme	Number 1
Material	Aluminum foil
Special features	Reusable, Self Sealing
Inflation	Supports helium or air

What to know before buying

The listing says a base is included, but its packing list instead names one uninflated foil balloon, one Bobo sticker and one thin straw. The precise contents for this selected Jelly listing are uncertain, so check the selected listing before buying.

Listing details to confirm

The size details are inconsistent: the title and description claim 40 inches (101 cm), while the listed item dimensions are 17.6 x 14.8 x 0.2 centimetres. The exact inflated size and how it is measured are not confirmed. The title identifies helium balloons, but the description says it supports either helium or air. The description says colour may vary from images and manual measurement may cause size differences.

What’s in the box

BaseCheck selected pack
40-inch foil number balloon, uninflatedCheck selected pack
Bobo stickerCheck selected pack
Thin strawCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

People decorating a birthday or milestone display with a large number 1 balloon.
Buyers who want the option to inflate with air or helium and store the balloon after deflation.

Less suited to

Anyone needing a confirmed exact inflated size or a clearly verified package inventory before purchase.
Anyone looking for a multi-number set. The listing identifies this as a number 1 balloon.

OFFCUP Jelly Number 1 Foil Balloon · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 236 ratings

5 stars70%70%
4 stars7%7%
3 stars7%7%
2 stars3%3%
1 star13%13%

Aggregate ratings lean positive, with most ratings in the five-star category, but a notable one-star share means the overall picture is not uniformly favourable. Without review comments, the reasons for either response are unknown. Buyers should weigh these ratings cautiously alongside the listing's unresolved size and package-content discrepancies.

Frequently asked questions

What number is this balloon?

The listing identifies it as number 1.

Can it be filled with air as well as helium?

Yes. The description says the straw supports either air or helium inflation.

Can the balloon be reused?

The listing says it can be deflated through the valve with the straw, folded and stored for future use.

How large is it?

The title and description claim 40 inches (101 cm), but the technical details list 17.6 x 14.8 x 0.2 centimetres. The exact inflated size is not confirmed.