Before you can spec a tube, you need to understand a tube. Most brand founders see a simple cylinder with a cap. But a cosmetic tube is an engineered packaging system with at least 8 distinct components — each affecting your product’s performance, appearance, and cost.
The Tube Body
The main cylinder that holds your product. It’s defined by three measurements:
- Diameter: D19, D22, D25, D30, D35, D40, D50 (measured in millimetres). Most facial skincare tubes use D25 or D30. Body lotions typically use D35 or D40.
- Length: Determined by the volume you need. A D30 tube at 120mm length holds approximately 50ml.
- Wall thickness: Typically 350-450 microns for PE Coex. Thicker walls = more rigid feel. Thinner walls = lighter weight and lower cost.
The Shoulder
The tapered section connecting the tube body to the orifice (opening). Shoulders can be:
- Standard conical: The classic look — a smooth taper from body to opening.
- Flat/wide shoulder: A more gradual transition, often used for larger diameter tubes.
- Shoulderless: No taper at all — the tube body connects directly to the cap area. Modern, sustainable, and premium-looking.
The Orifice
The opening through which product is dispensed. Standard orifice sizes range from 3mm to 11mm. Thicker products (creams) need a larger orifice. Thin products (serums) need a smaller one to control dosing.
The Cap & Closure System
Your cap is your customer’s first and last touchpoint. Options include:
- Flip-top (hinged): One-hand operation, most popular for daily-use products
- Screw cap: Secure seal, professional/clinical appearance
- Disc-top: Press to open, clean dispensing
- Nozzle cap: For precision application (eye creams, lip products)
- Pump/airless: For serums and premium formulations
- Applicator tips: Silicone, metal roller, sponge — for targeted application
The Side Seam
Where the tube body is welded or bonded together. In laminated tubes (ABL/PBL), this appears as a visible line along the tube length. In PE Coex tubes, the seam is typically smoother and less visible.
Pro tip: Position your artwork so the brand name and key graphics are on the opposite side of the seam.
The Seal (End Crimp)
The bottom of the tube, crimped shut after filling. Your manufacturer handles this, but you should know the seal types:
- Single fold: Standard, cost-effective
- Saddle fold: Flat bottom — the tube can stand upright
- Star crimp: Decorative, premium appearance
Print Area
Not all of the tube surface is printable. The shoulder area, seal area, and 2-3mm near the cap thread are typically unprinted. Your effective print area is approximately 80% of the tube body surface.
This is foundational knowledge covered in Module 1: Tube Design & Concept. Understanding anatomy helps you write better briefs and negotiate smarter.