PIPO 316 Stainless Steel Tumbler: Material, Insulation and Build
The PIPO tumbler is a 360 g double-wall vessel in 316 stainless steel, with a direct-drink lid and a six-hour thermal rating. It is a straightforward product, and most of what distinguishes it comes down to two decisions: which stainless grade was used, and how the lid seals.
316 versus 304 stainless steel
Most drinkware is made from 304 stainless steel, which is adequate for water and black coffee. 316 adds molybdenum to the alloy, which raises resistance to chlorides and acids. In practice that means three things for a tumbler:
- Tea, coffee and electrolyte drinks leave less staining, and the staining that does form lifts off more easily.
- Citrus and salted drinks are less likely to pit the interior surface over time.
- The interior is easier to keep neutral in taste, because a less reactive surface adsorbs fewer flavour compounds.
316 is the grade specified for food processing and medical equipment for the same reason. The PIPO uses it for both the body and the lid, so the beverage contacts 316 throughout.
Insulation: what six hours means
The tumbler is double-walled with a vacuum gap, rated to hold temperature for up to six hours. That figure is a laboratory benchmark measured under controlled conditions; real performance depends on fill level, ambient temperature and how often the lid is opened.
As a working guide: a full tumbler with the lid closed will still be hot at the four-hour mark and drinkable at six. Half-filled, in a cold vehicle, expect noticeably shorter retention. Pre-heating the vessel with boiling water for a minute before filling adds meaningful time at negligible cost.
The lid
The direct-drink lid removes the need for a straw, which is the main reason the tumbler suits commuting and site offices rather than desk use. The seal is designed to be leak-proof in a bag, but the closure should be checked after cleaning — a gasket that is not seated properly is the usual cause of a leak, not the lid design.
A non-slip base ring keeps the tumbler stable on smooth surfaces and quiet when set down, which matters in an office or a vehicle cab.
Weight and durability
At 360 g, the tumbler is light enough to carry in a daypack without noticing it and heavy enough to stay upright when knocked. Stainless steel of this gauge resists denting from ordinary handling; the vulnerable point on any vacuum vessel is the base seam, so avoid dropping it on concrete.
Because the exterior is powder-coated rather than bare, it resists fingerprints and minor abrasion. Hand washing preserves the finish; if a dishwasher is used, place the body on the top rack and the lid components where they will not be exposed to the heating element.
Specification
| Item | Detail |
|---|---|
| Brand | PIPO |
| Model | PIPO-C |
| Material | 316 stainless steel, body and lid |
| Construction | Double-wall vacuum insulated |
| Thermal rating | Up to 6 hours |
| Weight | 360 g |
| Lid | Direct drink, leak-proof |
| Finish | Powder-coated, non-slip grip |
Who it is for
The tumbler sits outside ROCKROOSTER’s safety footwear range and is sold as PIPO drinkware. It suits buyers who want a single vessel for coffee, tea and water through a working day, and distributors adding a low-friction accessory line to a footwear order.
Availability
The PIPO 316 stainless steel tumbler is available for wholesale distribution alongside the larger PIPO-SP bottle. Contact our sales team for carton quantities, colour runs and private-label options.