A cup lid is the cheapest item on a takeaway order and the fastest way to lose a regular customer: a lid that sits loose, splits at the hinge or drips through the drink opening costs more in complaints than it ever saved on price. Buying cup lids that work comes down to four decisions - rim, material, weight and the documents behind them.
Rim Diameter Comes Before Everything Else
A lid is held by two features: the plug seal that enters the cup, and the skirt that wraps the outside of the rim. Both work against the rim's outside diameter, not the cup's volume. Lids are interchangeable only inside one rim family, and our range covers 80, 89, 90 and 98 mm rims. Even inside a family, two suppliers' "90 mm" cups can differ within tolerance, so a lid that snaps tight on one may feel loose on another. Ask for the rim diameter with its tolerance, then test our lid on your own cup before committing to a container load.
Material Follows the Drink, Not the Design
PP is the workhorse for hot service. It holds a living hinge without cracking after repeated flexing, resists steam and takes colour well. Our 80 mm and 90 mm lid series are listed in the catalogue at -20 °C to 120 °C; treat that as a service range, not as proof at your fill temperature. If you fill above 90 °C or hold drinks under a heat lamp, ask for a migration test at your actual condition - ours is [to be confirmed].
PET gives the glass-clear look that sells an iced drink and stays rigid under a dome, but it softens earlier than PP and is the wrong choice for a hot Americano. PS (rigid polystyrene, not expanded foam) is clear, stiff and inexpensive for cold drinks; our PS lid documentation is [to be confirmed].
None of the three is biodegradable; a compostable lid is a different product with different documents.
Weight Is a Line Item You Can Actually Price
Within our 90 mm family the catalogue runs from about 5 g for the leak-proof straw lid to about 8.2 g for the twist lid, with 6.5 g for the coffee lid, 7 g for the two-piece hot lid and 7.2 to 7.7 g for the fold-back, smiley and micro-brew lids. On 1,000 pieces, 5 g against 8.2 g is 3.2 kg of polymer, and that difference shows up three times: resin cost, carton gross weight and freight per pallet. A heavier lid is not automatically better. Weight buys stiffness at the skirt and thickness at the hinge, and both matter only if staff open the tab dozens of times per shift.
Three Checks Decide Whether a Cup Lid Ships
Fit a sample and pull it off by hand: it should release with a distinct pop, not a slide. Fill with your hottest and coldest drink in turn, close the lid, invert it for a slow count of ten over a tray, and watch the rim and the drink opening. Then push a straw through the hole - it should pass without tearing the lid. Finally stack 20 lidded cups and measure the height; a lid that nests too deeply lifts the stack.
What a Cup Lid Test Report Covers, and Where It Stops
Three SGS reports sit behind this range; their scope is narrower than most buyers assume.
The EU report, SHAHG2123705201 dated 10 November 2021, covers a PET cup lid, Item No. XYA 102, against Regulation (EU) No 10/2011 with amendment (EU) 2020/1245: overall migration in 3% acetic acid and in 50% ethanol at 70 °C for 2 hours, sensory testing, and specific migration of heavy metals, primary aromatic amines, ethylene glycol and terephthalic acid. It covers the lid only.
The second, CANHL23006748201 dated 28 July 2023, covers a PET cup, PET dome lid, PP cup, PP lid and PP straw against US FDA 21 CFR 177.1520 and 177.1630 - a US report, not a substitute for (EU) No 10/2011. The third, T32220252098SC dated 25 April 2022, covers a black PP lid, Item No. XYA-104, under Japan's Food Sanitation Law.
Two limits matter. All three are item-specific, so a report on XYA 102 does not cover a different lid mould. And all three now fall outside the 24-month window several marketplaces apply to food-contact documents. A current report on your exact SKU, carrying your own model number, is [to be confirmed], as is our Declaration of Compliance under Article 15 and Annex IV of Regulation (EU) No 10/2011.
How EU Rules Treat a Plastic Lid
Cups for beverages are among the single-use plastic products listed in the Annex to Directive (EU) 2019/904, and bio-based and biodegradable plastics are managed as plastics under that Directive. A plastic lid is normally assessed together with the cup it closes rather than as a separate article. Whether a specific lid falls within the Directive, and which marking, EPR or labelling duty applies, depends on the material, the market and your target country. Final classification is the buyer's call.
Send Us Your Cup, Not Just Your Size
We supply PP, PET and PS lids for 80, 89, 90 and 98 mm rims: flat, dome, straw, flip-top, slider and two-piece. Tell us the drink, fill temperature and market, and send one of your cups - we will confirm fit, weight, carton count and which report applies.