Wildo Fold-A-Cup Review

Overview

Designed and manufactured in Sweden, the Wildo Fold-A-Cup is the original folding drinking cup — a simple, lightweight, compact, crush-proof travel cup that’s become popular across the globe.

At 25g and folding down to a 2.5cm puck, it’s the kind of item that earns permanent residency in your kit: toss it in a hip-belt pocket, forget about it, and be glad it’s there when you need a vessel for your morning coffee or a hot drink at camp. The Fold-A-Cup has been a favorite product for 35 years — and for good reason.

Key Specs

Spec	Value
Weight	25g / 0.9 oz
Volume	250ml / 8 fl oz
Folded Height	2.5 cm
Dimensions (folded)	9.5 × 7 × 2.5 cm
Material	TPE (50% plant-based)
BPA-Free	Yes
Max Temp	+100°C / -20°C
Dishwasher Safe	Yes (up to 70°C)
Made In	Borås, Sweden
Comparison	See how Fold-A-Cup compares to similar gear

Performance

The Fold-A-Cup’s party trick — inverting its upper half inward to collapse flat — works exactly as advertised, and it pops back into shape with a satisfying snap. As a bonus, the fold prevents the last drops from getting mixed with other equipment when the cup hits the backpack — a subtle but genuinely useful feature when you’re packing up a wet camp.

The material is TPE, rated 50% plant-based, which puts it ahead of most plastic drinkware on the sustainability front. More practically: the TPE holds up with boiling water without deforming.

It seems just as rigid with boiling water as with cold. It doesn’t burn the lips, and even the small handle is easily used and doesn’t get floppy with hot water.

That’s the most important test for a camp cup, and the Fold-A-Cup passes.

The cup’s surface is textured to provide a secure grip even with wet hands

, and

the stiff rim makes it easy to drink and prevents spilling, while the wide base allows the cup to stand steadily on a surface.

In practice, that stability matters more than you’d think — a flat-bottomed cup that doesn’t tip on a rocky table is worth something.

The one performance caveat worth flagging: the Wildo holds 250ml right up to the lip, and about 200ml in the “comfortable not to spill” range. That’s a smallish pour for a coffee drinker who wants a full mug. You’ll be going back to the pot. The larger “Big” version holds 600ml but is 1cm taller when folded and weighs 47g — a reasonable trade-off if you want a proper mug-sized pour.

On heat transfer: both cups in testing were comfortable to hold with hot tea, though more heat was felt from the Wildo. But the Wildo’s handle stows neatly and mitigates that issue. There’s no insulation here — don’t expect your coffee to stay hot for more than a few minutes.

Most users report no plastic taste, even with boiling water poured straight in. One reviewer noted they were worried about a plastic-y taste with hot beverages but didn’t notice any. Occasional reports of a faint aftertaste exist, though these seem to be the exception rather than the rule and often fade after a few uses.

Designer Tom Dixon included the Fold-A-Cup in his book Rethink as a reminder of the importance of function in design. Svensk Form’s opinion committee subsequently granted it artist protection, classifying it as a work of art.

That’s an unusual accolade for a camp cup — but when something is this well-executed at this weight, it’s hard to argue.

It is also NSN’d and standard-issue kit for the Swedish military

, which is a different kind of endorsement but equally telling.

Pros & Cons

Pros

• Genuinely ultralight at 25g — you won’t notice it in your pack
• 2.5cm folded height fits practically anywhere, including a hip-belt pocket
• Handles boiling water without deforming, warping, or going floppy
• BPA-free TPE with 50% plant-based content
• One-piece design — nothing to lose or break
• Folded position self-seals residual drips
• Textured grip and stable flat base
• Dishwasher and microwave safe
• Made in Sweden, over 35 years of proven design

Cons

• 250ml is a small serving — comfortable fill is closer to 200ml
• No insulation whatsoever; hot drinks cool quickly
• The handle is small; some users with larger hands may find it fiddly
• Not rated for storage, only serving
• Zero heat retention means it doubles poorly as a windowed mug for sipping

Who Should Buy This

This cup makes the most sense as a lightweight secondary vessel — the dedicated coffee or tea drinker in a group who wants their own cup without adding meaningful weight, the solo backpacker running a pot-cozy setup who wants something to drink from while the next portion rehydrates, or anyone who wants a flat emergency backup cup that truly disappears into a pack. For those hiking in small groups where a second or third cup is needed, this is a very practical mug that is light and packs up small. If 250ml is categorically too small for your morning ritual, look at the Fold-A-Cup Big instead — same design, more volume, only 22g heavier.

Verdict

The Fold-A-Cup is one of those rare pieces of gear that does exactly one thing and does it better than almost anything else at its weight. At 25g and 2.5cm folded, the price of admission is almost zero — in weight terms, you have no good reason not to carry one. The 250ml capacity is the genuine limiting factor for some, but for a backup cup or a compact hot-drink vessel, it’s hard to beat a design that’s been trusted by hikers and militaries alike for over 35 years. I’d rate it 8/10 — a near-perfect execution of a narrow brief, docked only for the small serving size and lack of any insulation.