The iPhone 18 Pro and Pro Max are here, and honestly? They're gorgeous. Faster chip, a seriously upgraded camera, and a price tag that makes you want to wrap the whole thing in a duvet.
So let's talk about what you're wrapping it in. The case is the one part of your new-phone setup that can actually be good for the planet, instead of just less bad. Here's our guide to the best biodegradable iPhone 18 Pro cases: what to look for, what to ignore, and why your shiny new phone deserves a case as thoughtful as it is.
What's new with the iPhone 18 Pro and Pro Max?
Apple unveiled the new line-up at its "Surprise and Shine" event on 9 September, with the Pro and Pro Max landing in shops from 18 September. The headlines: the A20 Pro chip, a 48MP main camera with a variable aperture, and a revamped Siri.
What you won't find is a standard iPhone 18. That one is reportedly arriving in spring 2027, alongside the iPhone 18e. If that's the phone you're waiting for, bookmark this page and we'll update it the moment it lands.
In the meantime, one thing hasn't changed: a brand-new phone still needs protecting. The question is how, without adding to the world's pile of plastic.
Why your phone case is secretly a sustainability decision
Most phone cases are made from petroleum-based plastic. They're designed to be tough, and that's exactly the problem: long after your phone has been upgraded, recycled or retired to a drawer of sad cables, the case is still out there, being a case. For centuries.
We don't love that. We're all about protection, but not at the planet's expense. That's why we make cases that are tough while you need them and gone (in a good way) when you don't. Not forever cases for a forever planet.
How to spot a genuinely biodegradable phone case
"Eco-friendly" is a very flexible phrase, and plenty of cases borrow it without earning it. Before you add to basket, run your shortlist through this checklist:
- What is it actually made of? Look for plant-based, compostable materials (like a bioplastic and bamboo fibre blend), not just "recycled plastic" or a vague green leaf on the packaging.
- Does it say how it breaks down? A real biodegradable case tells you where (compost) and roughly how long. Ours biodegrade fully in compost in around six months.
- What's the ink made of? Look for water-based inks, free from nasties like phthalates, BPA and cadmium.
- How does it arrive? A sustainable case in a plastic mailer is a missed opportunity. Look for plastic-free, recyclable packaging.
- Where was it made? Made-to-order, local production means less waste and fewer air miles. No warehouse full of unsold stock.
- Does it still protect your phone? Drop-testing, a raised rim for the screen, MagSafe compatibility. Looking cute is great, surviving the pavement is better.
- Is there a warranty? If a brand won't stand behind its case, ask yourself why.
Casulo biodegradable cases for the iPhone 18 Pro and Pro Max
We designed our cases to tick every box on that list, because we wanted to prove that stylish, high-quality and kind to the planet can all live on the same phone.
- 🌱 Plant-based and compostable. A flexible but tough blend of 100% compostable bioplastic and bamboo fibre. In compost, it biodegrades fully in about six months.
- 🛡️ Proper protection. Drop-tested from 5 feet, with a raised rim to keep your screen safe and a smooth-but-grippy finish that stays put in your hand.
- 🧲 MagSafe compatible. Your wireless charger, wallet and mounts all still work.
- 🎨 Bold, original designs. Every pattern is designed by us, from sea turtles to citrus groves to abstract earthy hills. No two people at the bus stop will have the same phone.
- 🧪 Clean inks and safe materials. Printed with water-based inks free from phthalates, BPA and cadmium, using FDA-compliant materials (FDA 21 CFR 175.300).
- 🌍 Made to order, close to you. We produce on demand in the UK, US, EU, Australia and South Korea, so your case travels less and nothing gets made that doesn't have a home.
- 📦 Plastic-free packaging. It arrives in recyclable, compostable paper, not a plastic bag.
- 🌳 A tree on top. Through our partnership with Ecologi, your case helps plant a tree. Here's how it works.
- 💚 Lifetime warranty. If your case cracks, warps or wears out unexpectedly, we'll replace it.
Cases start from £26.90, and you'll find our iPhone 18 Pro and iPhone 18 Pro Max options in the model selector on every design.
Our favourite designs for your new iPhone
Picking a pattern is the fun part. A few that are flying out of the Cocoon right now:
- Turtles. Blue sea turtles swimming across a speckled white case. It's one of our most-loved designs, and it's also the one our customers can't stop reviewing.
- Hills and Cliffs. Layered, earthy waves in peach, pink and terracotta. Calm, warm and made to flatter that new camera plateau.
- Orange Blossom and Lemons. Sunshine on a phone. Because it's October and we all need it.
- Taste of Summer. A cheeky grid of lobster, pretzels and chilli peppers. Unserious in the best way.
- Blue Watercolour Landscape. Soft mountains, a river and a cloudy sky. Pure "I'm definitely going hiking this weekend" energy.
Or browse all our eco-friendly phone cases and find the one that feels like you.
Complete the set
A new phone deserves a full eco upgrade. Pair your case with our Eco Glass Screen and Camera Lens Protector, made from recycled tempered glass and packed in plant-friendly packaging. And if you're an Apple Watch wearer, our vegan leather watch bands come in the same bold prints, cruelty-free and ready to match your case.
A little honesty about biodegradable cases
Here's the part where we're upfront: a biodegradable case is meant to break down eventually. That's the whole point. One of our customers noticed their case started to decompose after about a year and a half, and was thrilled about it. We love that attitude.
To give your case the best send-off, pop it in your home or industrial compost when it's time to retire it, rather than the general bin. And if it cracks or wears out unexpectedly before then, that's what our lifetime warranty is for.
Frequently asked questions
Do Casulo cases fit the iPhone 18 Pro and iPhone 18 Pro Max? Yes. Choose your exact model from the selector on the product page, and double-check it before ordering for the perfect fit.
Is there a case for the standard iPhone 18? The standard iPhone 18 is reportedly due in spring 2027. As soon as it's out, we'll have cases ready, and we'll update this post.
What are Casulo cases made of? A 100% compostable blend of plant-based bioplastic and bamboo fibre, with water-based inks. No petroleum-based plastic.
Are they really protective? Yes. They're drop-tested from 5 feet, with a raised rim to protect your screen, and thousands of customers have rated them five stars.
Do they work with MagSafe and wireless charging? They do. For faster wireless charging we recommend a charging ring.
How long does delivery take? We make everything to order near you, and most orders ship within 1-3 business days.
Dare to be you. Wear with care.
Your iPhone 18 Pro is going to be with you for years. Your case doesn't have to be. Choose one that protects your phone, shows off your personality and leaves a trail of unique green footprints instead of plastic.
