Terrarium Lids: How to Find Glass, Cork & Custom Options

Closed terrariums only work if you can actually close them.

Sounds obvious – but finding a lid that properly fits your container is one of the most frustrating parts of the build. Most containers don’t come with lids, and most lids aren’t made to fit the containers you already own.

So what’s the solution?

After years of building, testing, and improvising, I’ve found reliable ways to source (or create) terrarium lids that actually work.

In this guide, I’ll walk you through the best glass, cork, and custom options – and how to choose the right one for your setup.

Terrarium Tribe is reader-supported. When you purchase through links on our site, we may earn an affiliate commission (at no further cost to you). 💜

Picture it. You’re in Ikea, you’ve worked your way through the labyrinth, the Swedish meatballs are in sight, and only one last obstacle remains – the bargain bin.

That’s when you see her: glass, gigantic, and only $10.

She was born to be a terrarium – but there’s a catch, as there so often is with thrifty glassware finds. Your new favorite terrarium container is lidless.

Fear not; you have options. Here are the three best ways to approach it:

1 | Acrylic/Plexiglass

All hail the best all-rounder and my personal go-to solution for lidless terrarium containers.

It’s transparent, easy to clean, and readily available.

• If your container has a circular opening, you can grab one to size from this shop on Etsy.

• If your container has a rectangular or square opening, you might need to do a little more digging to find the exact size.

2 | Cork Plug 

A big cork stopper is fabulous if you want more of a rustic look and have a container with a circular opening.

And, because they’re wider at the top and narrower at the bottom, cork stoppers are suitable for a small range of opening sizes, just like a door wedge. With other lid shapes, you need to be much more specific. 

You can find them here on Etsy.

Just be aware that it will block light from the top, so you might need to pop your piece closer to the light source or next to a grow light. 

3 | Saran Wrap

Don’t sleep on Saran Wrap.

It’s not perfect, but it’s the ultimate “it’ll do for now option.”

And despite what you’d think, if you’re careful to stretch it flat and trim around the edges, it can look relatively neat. Relatively.

The main thing I noticed is that it can get super dusty, and if you need to take it off for any reason, it’ll most likely tear, and you’ll need a new piece and proper reapplication each time.

Make Your Own DIY Terrarium Lid? 

For the absolute DIY heroes out there, I’m sure you’ve already clocked that making an acrylic lid is pretty straightforward.

And it is, provided you have the right equipment.

Acrylic is cheap and easy to work with, but buying a vice and a saw is so much more expensive than I had anticipated (well over $100), so it’s only viable if you already own them.

If your terrarium is home to any lively inhabitants, this whole thing will need a different approach. 

Here’s what you need to consider:

• Pets will need some level of ventilation and airflow (duh).
• Depending on the animal and setup, you may need easy access for cleaning and feeding.
• You don’t want any escapees running around your house. 

Every animal and bug has different requirements, so always do research into your chosen terrarium pet.

First up, bioactive cleanup crews.

If your residents are just isopods, you can either go without ventilation (as long as you regularly open it up) or add fine mesh to ventilation holes to be extra safe on the escapee-prevention front.

On the other hand, if your terrarium houses springtails, I’d recommend forgoing ventilation altogether and choosing a loose-fitting acrylic lid. They don’t seem to need much airflow, and there’s no reason to have them open to the world.

For pets and isopods in small terrariums, the acrylic custom lid vendor I mentioned earlier has the option to add holes in for $1 – just to make your life easier! 👇

Larger animals will naturally need a larger tank-style container to suit their spatial needs.

So, for a lid, you’ll likely need something heavier or physically attached to the container. 

There are plenty of ready-made vivarium tank lids available for purchase, and some good options, like a sliding lid, are available if you want something a bit more high-tech. 

That concludes our quest for the perfect terrarium lid.

I hope you’ve found the perfect solution.

A terrarium lid isn’t just a finishing touch – it’s what allows the entire setup to function as a stable, self-contained environment.

Whether you’ve gone with acrylic, cork, or a temporary solution, the right fit will help regulate humidity, keep your plants happy, and keep everything inside doing exactly what it should.

Once your lid is sorted, you’re ready to start collecting your materials and starting your build. If you’re putting together a full sealed setup, you can follow our complete guide to building a closed terrarium from start to finish.

Till next time x