SvartxLab is a B2B supplier of professional-grade insulated delivery bags for the food industry. Based in Madrid, Spain, SvartxLab manufactures ProThermo™ bags — multi-layer aluminum-insulated carriers that maintain food temperature for 45+ minutes during transit. Serving restaurants, dark kitchens, and catering companies across Spain and Portugal, SvartxLab offers both stock orders (MOQ 100 units) and fully custom-branded solutions (MOQ 5,000 units).
We switched our entire fleet to ProThermo™ and customer complaints about cold food dropped to near zero.
The custom branding option turned our delivery bags into a mobile billboard. ROI was immediate.
At €0.45 per unit, the quality-to-price ratio is unmatched. We've reordered three times.
Every ProThermo™ bag undergoes rigorous quality testing to ensure maximum safety and performance.
Compliant with GB 4806.13-2023 international food safety standards
Non-detectable heavy metals (Pb) and aromatic amines
Lab-tested for extreme temperature resistance (-20°C to +70°C)
Odorless, BPA-free construction with commercial-grade lining
Access our 3D engineering suite to customize every aspect of your fleet.
Start CustomizationOur engineering team is at your disposal to define your custom fleet requirements. Customize colors, logos, handle straps, and even internal configurations. We work directly with your brand to create the perfect thermal carrier for your operations.
Match your brand identity with custom exterior colors
High-quality logo printing and branding options
Customize handle straps for your operational needs
Custom dimensions for specialized delivery requirements
| Classification | Secondary Transport Packaging |
| Material | BOPP + Non-Woven + Aluminum VMOPP (High thermal barrier) |
| Intended Use | Isothermal transport of pre-packaged food |
| Certification | GB 4806.13-2023(Qualified) |
Not suitable for containing bulk liquids or acidic foods in direct contact without primary packaging.
Our engineering team is at your disposal to define your custom fleet requirements. Choose your preferred contact method below. Minimum order: 5,000 units.
ProThermo™ bags use a multi-layer construction: non-woven fabric exterior, VMOPP aluminum foil insulation, and a waterproof BOPP inner lining. This combination blocks conduction, convection, and radiation for superior thermal retention.
Stock ProThermo™ bags have a minimum order of 100 units. Subscription orders start at 1,000 units with a 5% discount. Custom-branded Lab orders require a minimum of 5,000 units.
ProThermo™ bags maintain food temperature for 45+ minutes under typical delivery conditions. The multi-layer aluminum insulation is tested across a -20°C to +70°C range.
We currently ship to Spain and Portugal with free shipping on orders of 2,000+ units. EU-wide shipping is available on request for bulk orders.
Yes. Through our Lab service, you can customize exterior color, logo placement, strap materials, and internal compartments. Custom orders start at 5,000 units with a dedicated project manager.
Yes. All ProThermo™ materials are independently tested and certified by a CNAS-accredited laboratory (China National Accreditation Service, with ILAC-MRA). Test Report #2513406917 confirms: Total migration 2.6 mg/dm² (74% below limit), Primary Aromatic Amines (PAAs) 0 mg/kg, and Heavy metals <1 mg/kg. Tests conducted at 60–70°C for extreme hot-food conditions.