The SLS mark, at the shelf SLS සම්මත ලාංඡනය පරීක්ෂා කිරීම

Our SLS rules page explains the law. This one is for the moment you're standing in the shop (or scrolling a listing) with a bottle in your hand: does this bottle need the mark, where is it, and what if it isn't there?

SLS 1616 · SLS 1306 In force since 1 Apr 2026 දරුවන්ට ආරක්ෂිතයි
Rows of plastic water bottles on a supermarket shelf
Since April 2026 the plastic bottles on these shelves need the SLS mark — glass doesn't.

First question

Does this bottle even need the mark? මෙම බෝතලයට සම්මත ලාංඡනය අවශ්‍යද?

Bottle typeStandardSLS mark needed?
Reusable plastic drinking bottleSLS 1616Yes — since 1 Apr 2026
Polymer feeding bottle (baby)SLS 1306Yes — since 1 Apr 2026
Glass water bottle (wasa bothal)—No — outside the rule
Stainless steel bottle—No — outside the rule

The mark is issued by the Sri Lanka Standards Institution (SLSI) after testing; imported plastic bottles must additionally pass SLSI's import inspection scheme before entering the market.

The check

Four looks, ten seconds තත්පර දහයක පරීක්ෂාව

1
Look at the bottle and its packagingThe SLS certification mark should appear on the bottle itself or its packaging. If it's on neither, keep your hand off it.
2
Check what it claimsMarked bottles usually state the standard — SLS 1616 for drinking bottles, SLS 1306 for feeding bottles. Numbers that don't match the product type are a red flag.
3
Buying online?Zoom the listing photos on the cap and packaging for the mark, and ask the seller's chat for certification details if the photos don't show it.
4
Still unsure? Don't buyWith glass from about Rs. 349 as an alternative, there's no reason to gamble on an unmarked plastic bottle.

The awkward case

Old stock or illegal stock පැරණි තොගද, නීතිවිරෝධී තොගද?

After 1 April 2026, uncertified plastic bottles on a shelf are either leftover old stock or stock that shouldn't be sold at all — the rule bans manufacture, import and sale of uncertified bottles. Sellers clearing old stock cheap is one reason the price gap between certified and uncertified plastic can look confusing.

If you believe a shop is selling uncertified bottles as new, the Consumer Affairs Authority (CAA) is the enforcement body — you can report it through their official channels. Expect certified plastic to cost noticeably more than before: that's the certification showing up in the price.

Honest limits

What the mark does — and doesn't — promise සම්මත ලාංඡනයේ සීමා

The SLS mark means the bottle's material meets the standard as certified. It doesn't make plastic immortal: a marked bottle that's scratched, cloudy, sun-baked or years old should still be retired. And it doesn't apply to glass or steel at all — those simply sit outside the rule, which is one reason the shelf has moved towards them.

Full timeline and sources — the gazette, the two standards and the government-office ban are explained on our SLS rules page.

FAQ

Quick answers ඉක්මන් පිළිතුරු

Which bottles need the SLS mark?
Plastic drinking bottles (SLS 1616) and polymer feeding bottles (SLS 1306), since 1 April 2026. Glass and steel are outside the rule — see the table above.
Do imported plastic bottles need it too?
Yes — imports must pass SLSI's import inspection scheme before entering the market, per the October 2025 regulations.
Who enforces the rule?
The Consumer Affairs Authority. Uncertified stock can't legally be manufactured, imported or sold after the effective date.
Does the mark matter for baby bottles?
Yes — feeding bottles have their own standard, SLS 1306. We cover buying tips in the baby bottle guide.

Skip the paperwork — go glass වීදුරු බෝතල් තෝරන්න

No mark to hunt for, from Rs. 349. Here's how to pick a good one.

Quality check guide Buyer's Guide →