100 ml Bottles: Where Travel, Trial and Gift Sets Meet
By Joe Joo · 8PCK · Shantou · Updated 26 October 2026
100 ml is the largest bottle most airline regimes allow in hand luggage, and the smallest that still reads as a product rather than a sample.
100 ml sits at a useful boundary: it is the hand-luggage maximum in most markets, and the size at which a sample becomes a product.
That makes it the default for travel sets, gift packs and the smaller retail format of a line.
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The 100 ml Advantage
It is the largest size a traveller can carry on, which is why so many travel ranges converge on it. It also fits a hand and a shelf without looking like a bulk pack.
Travel and Gift Sets
Three 100 ml bottles fit a clear pouch and a carton, which is why the size dominates travel kits.
Retail Single
Large enough for a month of use in a lightweight product; small enough to price as an entry SKU.
Neck and Closure at 100 ml
20/410 is common for flip-tops and fine mist; 24/410 takes a standard lotion pump without looking disproportionate.
If the pack is a travel set, use the same neck across sizes so one pump fits the 50, 100 and 250 ml.
What to Watch
A 100 ml at 0.45 mm wall survives a handbag and not a checked case. For travel, 0.5 mm is the practical floor.
Labels on travel packs face abrasion; a synthetic label with a waterproof adhesive or silkscreen is the durable option.
Where This Size Fails
A 100 ml pack is bought for travel sets and entry-size retail, and almost every complaint traces to a wall thin enough to crack in a case. The bottle is rarely the problem; the interface is.
The Wall Thickness Floor
Below 0.45 mm a bottle survives a handbag and not a checked case; 0.5 mm is the practical floor for anything that travels.
The Closure Thread
A 410 closure on a 415 neck threads on and weeps. Confirm the thread code, not the diameter.
The Label Edge
Humidity and abrasion lift a paper label within days. Synthetic label or silkscreen.
What to Send in a Brief
Capacity (100 ml), neck, closure type, quantity and whether the pack travels. Those five answers are enough to quote with packing data, and they decide the wall and the liner before a sample is made.
100 ml in PET, HDPE and Clear: Which One You Are Actually Buying
The 100 ml size is moulded in more than one resin, and the resin decides what the pack can carry. Clear PET for a product that has to be seen; HDPE where the formula is opaque or attacks PET; PETG when the wall has to look thick like glass.
60 ml and 120 ml sit either side — the neck is usually shared, which is why one closure range covers the whole family. If you are switching between 100 ml and 60 ml, keep the neck the same and only the body changes.
Clear PET
The default for shampoo, water and anything sold on colour; light, recyclable, food-grade.
HDPE
Opaque, cheap, and resistant to surfactants — the choice for detergent and chemicals.
PETG
Thicker wall, closer to glass; costs 20–30 % more per unit.
Questions We Get on This
Why is 100 ml so common for travel?
It is the maximum allowed in hand luggage in most regimes, so travel ranges standardise on it.
What neck does a 100 ml bottle use?
20/410 or 24/410, depending on the closure.
Can I use one pump across sizes?
Yes if the neck is the same; standardise the neck before ordering closures.
What is the MOQ?
1,000 pcs per colour.
What is the MOQ for a 100 ml bottle?
1,000 pcs per colour on existing moulds.
Can the 100 ml bottle travel?
Yes with a 0.5 mm wall and a closure with a deep spigot or a valve; a thin wall cracks in a case.
Which closure should I choose?
Flip or disc top for thin liquids, pump for lotion, dropper for serum — the neck decides what fits.
Can I get the 100 ml in clear and in white?
Yes — same mould, different resin or masterbatch; the neck stays identical so closures carry over.
Sizes That Fit This Guide
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Every batch is gauged at the neck and weighed. The documents travel with the shipment.