guides
Short, honest guides to the bags we make and the category they sit in.
We write these because there is a lot of vague information about jelly bags online and not much that is plain or trustworthy. Each guide is short, factual, and links to the bags we actually sell so you can see what we are describing.
What is a jelly bag?
A plain-English explainer on the jelly bag — what it is, where the look came from, and why it's having a moment again.
TPU vs PVC bags — what's the difference?
The two materials behind the Jelly Firkin Bag, compared on feel, durability, transparency, price and care.
Birkin vs jelly Birkin — what people are really asking
Why the term 'jelly Birkin' shows up online, what it actually refers to, and how a jelly bag is and isn't related to the real thing.
The Birkin bag: a short history
From a 1981 plane meeting with Jane Birkin to today's waitlist culture — and why an adjacent category of plastic bags grew up around it.
K-pop and the jelly bag revival
How Y2K styling, stage-light photogenics and airport fashion turned a 1990s plastic accessory back into a mid-2020s wardrobe staple.
Melissa: the brand that invented modern jelly fashion (and 40+ years of collaborations)
The 1979 Brazilian sandal that started everything, Melflex PVC, and the long collaboration archive — Vivienne Westwood, Karl Lagerfeld, Jean Paul Gaultier, Comme des Garçons, Marc Jacobs and more.
Jelly bag brands in 2026: an honest market guide
Who makes what — Staud, JW Anderson, BY FAR, Cult Gaia, Susan Alexandra, Coperni and Firkin — with a buyer's checklist for choosing the right one.
Translucent vs opaque jelly bags — which to pick
How to choose between the two finishes — visual impact, practical considerations, and which colours work best in each.
How to style a jelly bag — office, weekend, wedding, holiday
Where a jelly bag fits in real life — six scenarios with the colour and finish that works in each.
A short history of the jelly bag — Lucite to Y2K to now
From 1950s Lucite to 1960s vinyl to 1979 Melissa to the 1990s translucent wave to the current 2020s revival.
How to clean and care for a jelly bag
A step-by-step care guide for TPU and PVC bags — cleaning, drying, storage, and what to avoid.
Have a question we haven't covered? See the FAQ, or email firkinworld@gmail.com.