Flat Stacks bases are made of silicone, not plastic. Silicone is a strong, flexible and durable material that can withstand extreme heat and cold without bending or cracking so it’s very long-lasting. Unlike plastic containers, Flat Stacks will last you many years so you won’t need to replace them saving you money and helping the environment. Silicone is also BPA free which means it’s non-toxic and safe for you and your family. The Flat Stacks lids are made of a BPA free plastic.

Silicone is a very durable and long lasting material. We give you a 5 year warranty so you can be guaranteed they will last at least that long. However we expect with average use they will last you upwards of 10 years making them a great investment as they will save you money over the long term on replacing plastic containers that become warped and discoloured.

When you buy direct from us with this special offer we give you an extended 5 Year Warranty. This covers both the bases and the lids for any faults or failures from normal usage.

Yes both the bases and lids are BPA free.

Yes they are, when microwaving make sure the air vent is open to release the steam.

No they cannot currently be used in the oven however we are working on a special range for the oven in the future so be sure to subscribe to our mailing list to be the first to hear when they’re released.

We’re a family owned Kiwi company based Mount Maunganui Unfortunately the only place we have been able to find that can make them is in China, however we are currently trying to have them made locally in NZ.

We offer Free Delivery on orders over the free delivery threshold (check top of website or slider in cart). We typically send out all orders the same or next business day. Most customers receive their orders in 2-7 days from when we send it however if you’re in a more remote part of New Zealand it can take longer. We always use tracked delivery so you will be able to check where your parcel is at all times.