FAQs

Flat Stacks are the innovative solution to kitchen clutter. Our collapsible, stackable, airtight, microwave-safe, and colour-coded silicone kitchenware will transform your kitchen into an organised, stress-free space. Enjoy more time for what matters most in life.

Flat Stacks is a family owned and operated business created by Julie, a mother of 3 turned entrepreneur and her children Liam & Courtney. Julie takes care of product development and quality control while Courtney runs the day-to-day operations, creates content and appears in many of the videos and Liam and his team at Above & Beyond Digital look after managing the website and marketing. Together, they're committed to helping Australian families (and soon the world) declutter their kitchens.

Flat Stacks are crafted from high-quality food-grade silicone, offering significant advantages over traditional plastic containers:

• Durability: Silicone withstands extreme temperatures without warping or cracking, unlike plastic that can degrade over time with heat exposure.

• Flexibility: The pliable nature of silicone allows for easy storage and collapsibility, saving space in ways rigid plastic containers can't match.

• Safety First: Our 100% BPA-free silicone eliminates concerns about harmful chemicals leaching into food, a common worry with some plastics.

• Eco-Friendly: Silicone's longevity means fewer replacements and less waste compared to plastic containers that often end up in landfills.

• Versatility: From freezer to microwave, silicone handles temperature changes seamlessly, while plastic can become brittle when frozen or warp when heated.

• Odour and Stain Resistant: Unlike plastic, silicone doesn't absorb food odours or stains, keeping your containers fresh and clean for longer.

• Non-Reactive: Silicone doesn't interact with food acids or oils, preserving flavors better than plastic which can sometimes affect taste.

Our original Flat Stacks feature BPA-free plastic lids, while our Ovenware line boasts all-silicone construction from base to lid for maximum heat resistance.

By choosing Flat Stacks, you're investing in a smarter, safer, and more sustainable storage solution that outperforms plastic in every way.

Yes. Flat Stacks are microwave-, dishwasher-, and freezer-safe. However we recommend washing the lids by hand as they will last longer and won't lose their shape.

The Original Flat Stacks containers cannot be used in the oven as they are not designed for such high temperatures.

However, our Ovenware Flat Stacks are oven-safe and can also be used in air fryers, microwaves, and on BBQ plates (however, avoid direct grill contact or open flames).

You can easily tell the difference between the two because the Ovenware is navy blue in colour, and comes with a soft, silicone lid; whereas the Original Flat Stacks come in various colours and have hard lids.

The Ovenware Flat Stacks can be used on a BBQ plate (but not on the grill or open flames), however the Original Flat Stacks cannot.

Ovenware Flat Stacks are navy blue with soft silicone lids for easy identification while Original Flat Stacks come in various colours and have hard lids.

• Original Flat Stacks: Various colours with matching colour-coded hard lids, microwave and dishwasher-safe. Not for oven, air fryer, or BBQ use.
  
• Ovenware Flat Stacks: Navy blue with soft silicone lids, safe for ovens, microwaves, air fryers, and BBQ plates (however, avoid direct grill contact or open flames).

BPA is an industrial chemical, often used in plastic consumer goods like water bottles and containers. Some studies have linked it to various illnesses.On the other hand, BPA-free means BPA hasn’t been used in the production of the container, and so is totally safe for your family to use.

Absolutely! Flat Stacks are versatile enough to handle soft foods and liquids like soups. However, to ensure the best experience:

• Mind the Weight: Avoid placing heavy items on top of your Flat Stacks to prevent accidental collapsing.

• Travel Smart: When transporting in a bag, position your Flat Stacks to minimise pressure on the container. This helps prevent the valve seal from opening and potential leaks.

• Seal with Care: To properly close your Flat Stacks, place the lid squarely on the rim and apply gentle pressure from opposite sides simultaneously. This ensures a secure, leak-proof seal without straining the container.

By following these simple tips, you can confidently store and transport a wide variety of foods in your Flat Stacks, from meal prep to leftovers and everything in between.

Flat Stacks Original Containers come in lots of different sizes ranging from the smallest containers of the Snack Pack at 250-350ml right up the Jumbo containers at 3-5 Litres.

Flat Stacks Ovenware also comes in many different sizes ranging from the Air Fryer Set at 1-2 litres through to the Jumbo Sizes at 6-7 litres.

You can view the detailed sizes and dimensions by exploring the range here and clicking through to any product and it will be written in the description.​

Some Flat Stacks sizes are available as individual containers and others are available only as part of a set at this stage.

Thanks to valuable customer feedback, we are working to release sets that have all multiple containers of the same size.

Sign up to our email list to be notified when they're released and receive a 10% discount off your first purchase.

At Flat Stacks, we take your security seriously. That's why we've partnered with Shopify, a global leader in e-commerce, to handle all our payments and data protection.

Why you can shop with confidence:
• Shopify powers over 600,000 stores worldwide
• Bank-level encryption keeps your data safe
• We never see or store your credit card information

Convenient Payment Options:
• Major credit cards: Visa, Mastercard, American Express
• Digital wallets: Apple Pay, Google Pay
• Buy now, pay later: AfterPay
• Secure online payments: PayPal

Speed through checkout with Apple, Google, or Shopify Pay. Your payment details are securely stored, so you can complete your purchase in just a few clicks.

We know you're excited to start organizing with your Flat Stacks. Here's how we get them to you:

• Free Delivery with Tracking: Orders over $149 ship free within Australia
• Flat Rate: Just $14.95 for orders under $149
• Express Option: Available at checkout for those in a hurry

Delivery Timeframes:
• Standard: 4-10 days
• Express: 1-4 days
• All orders dispatched within 1-2 business days

Track Your Order:
• Automatic email updates
• Full tracking on all parcels

Currently, we ship within Australia only. We're working on international shipping options to bring Flat Stacks to kitchens worldwide soon!

Want more details? Click here for more information on delivery.

At Flat Stacks, we're not just a business — we're a family that stands firmly behind our products. We use Flat Stacks daily in our own kitchens and are confident you'll love them just as much as we do.

However, we understand that sometimes things don't work out as expected. That's why we offer:

• 30-Day Money-Back Guarantee: If you're not completely satisfied with your Flat Stacks for any reason, simply return them within 30 days for a full refund. No questions asked.

• 5-Year Extended Warranty: All Flat Stacks purchased directly from our store come with a 5-year warranty against defects. We're in this for the long haul, just like our products.

Your peace of mind is our priority. We're committed to ensuring you have the best possible experience with Flat Stacks.

Read more about our warranty here.