Themed popcorn buckets popularity as collectibles for years now, first starting out as limited release theme park items and in recent years growing into most major movie theaters. While most people have heard about the bad bucket of Dune and the offering of Deadpool and Wolverine designed to make fun of it, the truth is that many big movies hit the theaters with a type of popcorn and collectible drink that goes beyond a design wrapped in a standard bucket or cup. It’s not always an option for smaller movie releases like the upcoming Markiplier-backed Iron Lung, but a collaboration with Regal Cinemas will allow anyone with a 3D printer to show their support by making and carrying a movie-themed bucket. And, as you can see pictured above, the design is intense.

The rules are simple: If you show up with one of these in hand you get free popcorn on opening weekend. Unfortunately, I’m here to throw cold water on this plan and urge you to heed a few warnings before you show up ready to eat from your giant nightmare bucket.

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Although this article seems to me to be a bit out of this idea, the opposite is true. I like the idea behind this promotion and how it makes an audience like Markiplier, who more than likely has some kind of 3D printer, have a ready excuse to use it for something like this. With a little design polish and some printer recommendations on how to make sure it’s safe to use and remains something that looks good on a shelf, it’s the start of a fun new world of fan-backed nerdy popcorn buckets and more. I’m a fan of that coming, once we get past some of these early bumps.

First and foremost, you need to be very careful with what you use to print this bucket and how you print it. The most common material used to print things today is polylactic acidor PLA, which is made with plant starches, usually from corn, and is what you’ll find on most electronics store shelves for 3D printers. While PLA itself is generally considered food safe when at room temperature, the printing process and how you choose to use a printed item can affect how food safe it really is. The mechanical parts of a 3D printer are covered in lubricants to ensure smooth operation so it is impossible to avoid some transfer to the plastic as it is being formed. And I haven’t even mentioned the risks involved in painting this stuff before eating from it, which you shouldn’t do.

The way 3D prints are put together also introduces some issues with using PLA for food. The individual layers of each print and the semi-porous nature of the plastic can hold bacteria and make it unsafe to eat if not properly sealed. If you think you can just wash it, remember that this material begins to soften at around 120 Farhenheit, which is below the temperature of hot water that comes from most US faucets. It’s also only about the temperature of the melted butter in your popcorn when served fresh, which doesn’t mean it will harm the print, but it does introduce bacterial hazards if used more than once. You can reduce some of this risk by switching to polyethylene terephthalate glycol filament (PETG for short) or invest in some food-safe sealant for the inside of the bucket. I’m a fan of this this sealant is food safe from Krowne, but there are many other options out there.

It should also be noted that this bucket consumes a fair bit of material. The design, which is free of charge Thingiversesplit into two pieces, and each takes about a full $20 to $25 roll of filament to print so you’re not saving any money here (which isn’t the point, but a common misconception that printing is always cheaper). There’s a bottom half with all the teeth and the Iron Lung branding for the film, and the bloody top half with the Regal logo on display. The top half has no bottom, and although there are no instructions telling you to glue these two pieces together that’s likely the attitude of many people who choose to do it. A twist-lock design or a full bottom insert is a better idea here.

Both parts of this design need to be printed with supports, and depending on the type of printer and slicer software you have those supports can quickly become expensive. There are several thin overhangs that are expensive to support, not to mention how easy it is to break thin pieces while cleaning the supports. At the very least, the teeth could have been designed to print separately to save time and frustration. If you have a printer with multi-color support and only one extruder, the color changes, in addition to the supports, indicate a small amount of plastic waste. You can paint them all in one color and paint them yourself, but that is also time consuming.

Whether you plan to go all out and make your bucket as detailed as possible, or you want to get free popcorn to enjoy your movie, you are in for a treat, proper movie theme. But as companies look for ways to encourage community participation for movies that don’t have huge marketing budgets, hopefully, some of those initial issues can be quickly addressed to make everyone happy.