The Wonderbag is a non-electric slow cooker that uses heat-retention technology to continue cooking food once your pan has been removed from the heat source.

To cook, simply bring the food to the boil on a stove, let it simmer, and then put the pot into the Wonderbag. Cinch the Wonderbag tightly with the drawstring, and allow the food to slow cook to perfection for up to 8 hours.

It works by retaining the heat within the pan, and maintaining this heat for several hours, helping to continue cooking the food without additional energy.

The Wonderbag can continue cooking food for up to eight hours, and keep your food warm for several hours after this.

It is important to boil your food before placing in the Wonderbag and transfer it to the Wonderbag as quickly as possible once removed from the hob. This helps to ensure the temperature of the food is as hot as possible from the beginning of the Wonderbag cooking process, thereby helping it to retain the heat for longer.

Using a Wonderbag is a new concept for most people, and as a result it often requires some trial and error - which can be part of the fun!

As the Wonderbag does not add additional heat to your food, make sure you get your food to a hot temperature before placing it into the Wonderbag. You can do this by boiling your food to begin with and transfer your pan to the Wonderbag as quickly as possible once removed from the heat source.

If cooking meat, start with smaller pieces and work your way up to bigger pieces once you have a good feel for the Wonderbag.

For more tips, visit our Top Tips page here: wonderbagworld.com/top-tips

We have three different Wonderbag sizes:

Small – suitable for pans up to 2 litres, and is ideal for serving 1 or 2 people
Medium – suitable for pans between 2-6 litres, and is ideal for cooking up to six portions
Large – suitable for pans between 6 -10 litres, and is ideal for large families or batch cooking

This is subjective and depends on your pan size and cooking requirements, so please check our sizing recommendations within this FAQ for guidance.

If you have doubts, we usually recommend going with a larger bag as this allows you to use bigger pans in the future, and allows you to tighten the bag and add additional towels to fill your Wonderbag if your pan is on the smaller size.

What are the maximum dimensions of the pans that can fit in a Wonderbag?

Small – suitable for pans up to 2 litres
Medium – suitable for pans between 2-6 litres
Large – suitable for pans between 6 -10 litres

This is a popular question! We recommend copper, steel, aluminum, enameled cast iron, cast iron and glassware pots.

If you have any doubts, feel free to contact us through the Contact Form.

We aim to transfer the Wonderbag around the world as sustainably as possible by reducing the packaging size. This is achieved by shrink wrapping the Wonderbag, which means the item needs puffing up when it arrives to you.

Once you open the packaging for the first time, try moving the foam around and get air into the Wonderbag to puff it up to the correct size. If you find it still isn't puffing up, try placing it in a tumble dryer for a couple of minutes, this normally does the job!

The lifespan of a Wonderbag is dependent on how much it is used and how well it is looked after. We started selling Wonderbags in 2008 and some of these are still going strong, that’s nearly 17 years!

We use polyester fabric for the exterior, and re-purposed foam insulation for the interior, helping to divert a large quantity of material from landfill each year.

All Wonderbags are quality checked before leaving the warehouse, however if you find that your bag is faulty, please complete the Contact Form and we will do our best to help you.

Worldwide: you can purchase directly from our online shop by visiting wonderbagworld.com/global.

South Africa: you can purchase directly from our online shop by visiting https://www.wonderbagworld.co.za. You can also purchase from a number of physical retailers across the country, please contact us through the Contact Form.

If we, or our Resellers, do not currently sell the Wonderbag in your country, please add your details to our Global Waitlist and we will send you an email when it is available. The waitlist can be found here: wonderbagworld.com/global.

If you are unable to buy from our online shop, please get in touch through the Contact Form.

If we, or our Resellers, do not currently sell the Wonderbag in your country, please add your details to our Global Waitlist and we will send you an email when it is available. The waitlist can be found here: wonderbagworld.com/global

If you find that the size you require is sold out, you can select 'Notify Me When It's Available' to be notified when it is back in stock.

You will receive a tracking number when your order has shipped or you can view in the Account section of this website. If it has been one week since placing your order and you are yet to receive your items or a tracking number, please complete the Contact Form and include your order number.

All Wonderbags are quality checked before leaving the warehouse, however if you find that your bag is faulty, please complete the Contact Form and we will do our best to help you.

Our warehouses aim to post orders as quickly as possible, usually the same day we receive the order. As a result, it is often difficult to amend orders once they have been placed.

If you find that your order was placed incorrectly, please message us as quickly as possible by completing the Contact Form and we will try our best to make the amendment before the item is shipped.

In South Africa we offer Wonderbags at a subsidized price, made possible with the help of carbon credits, we call these 'Carbon Wonderbags'.

By buying a Carbon Wonderbag you are agreeing to be included in the South African ‘Recipe for Change’ project, registered with VERRA.

Your only obligation is to supply contact information and agree to be included in the usage for fuel survey from time to time. Each bag is differentiated by a unique serial number.

A mobile phone that will not have a sim card swap (ie. keep same number), and ID document/passport.

There is no difference in the efficiency, only that the Carbon Wonderbag must remain with the person who originally purchased it. The owner agrees to be contacted at least annually for a usage survey, this may include home visits.

If you would like to purchase a Carbon Wonderbag in South Africa and meet the criteria, please go to mywonderbag.co.za

Two Wonderbags can be purchased per person with your ID.

We welcome new Resellers of the Wonderbag around the world, please complete the Reseller Application Form, outlining your country, the market opportunity, and your retail experience. Once you are approved, we offer a discount on our pricing with a minimum order quantity of 4 units per SKU (1 carton) and 16 items per order (4 cartons). We ship South African orders from our factory and ship International orders from our UK warehouse. If you plan to order larger quantities of >96 units (24 cartons/1 pallet) we will ship from our South African factory and can offer a larger discount.

If you don't want to hold stock but you do want to promote Wonderbag on your socials, you can sign up to our Referral Program.

As a social enterprise we welcome discussions with organisations helping people in need. Please complete the Contact Form.

We welcome opportunities to grow the awareness of Wonderbag, please complete the Contact Form. If you just want to promote Wonderbag on your socials, you can also sign up to our Referral Program.

Feel free to contact us with more details by completing our Contact Form.

We offer discount for bulk purchases, please complete the Contact Form.

Years back we had a 'buy one give one' model, however we have since moved away from this and instead use a portion of our profits to help subsidise bags for lower income families.

As an example, many organisations in the UK reach out to us asking for subsidised bags for families who may be struggling with the cost of living crisis. By selling Wonderbags at full price, it then allows us to offer the bags at near cost price to such organizations. An additional example is our donation to Ukrainian soldiers fighting on the frontline, cooking with limited gas and electric. Without the support of our community buying the Wonderbag at full price, we wouldn't be able to support such donations.