# Vacuum flask Rivacase 90311BK — 0.5 L, black, stainless steel inner, plastic outer

**URL:** https://aio.lv/en/product--rivacase-90311bk-black-vacuum-flask--2091063
**Data updated:** 2026-03-07 11:03 (EET)
**Category:** Thermoses
**Manufacturer:** Rivacase
**Manufacturer code:** 90311BK BLACK VACUUM FLASK
**EAN:** 4260403573846
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 13.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--rivacase-90311bk-black-vacuum-flask--2091063

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.99 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Rivacase 90311BK is a 0.5 L vacuum flask designed for keeping beverages hot or cold. It features a stainless steel inner housing and a plastic outer shell, with compact dimensions (76 × 76 × 225 mm). Suitable for daily use, travel or office, it offers portable thermal insulation for coffee, tea or other drinks.

## Long description

Rivacase 90311BK is a 0.5 L vacuum flask designed to keep beverages hot or cold during daily use, travel or in the office. The inner chamber is made of stainless steel for corrosion resistance and easy cleaning, while the plastic outer shell provides impact protection and reduces the external temperature transfer. With compact dimensions (76 × 76 × 225 mm) and a 0.5-litre capacity, this black flask is intended for portable thermal insulation of coffee, tea and other drinks.
Advantages
The stainless steel inner housing maintains beverage temperature and resists tastes and odors, while the plastic outer shell lowers weight and improves grip. The 0.5 L capacity is suitable for single-person portions and the compact cylindrical shape fits most cup holders and backpack pockets. The design combines thermal performance with easy maintenance and everyday portability.
Suitable for
 Commuting and travel
 Office use and meetings
 Short outdoor activities and walks
 Home use when preparing single servings of hot or cold drinks
Key specifications
 Capacity: 0.5 litres
 Inner material: stainless steel
 Outer material: plastic
 Colour: black
 Dimensions: 76 × 76 × 225 mm
 Form factor: cylindrical, portable
How to use
Before first use, rinse the stainless steel inner chamber with warm water and mild detergent, then dry thoroughly. To fill, unscrew the lid, pour the desired hot or cold beverage and close the lid tightly to preserve temperature. For best thermal performance preheat the flask with hot water or precool it with cold water for a few minutes before filling. Clean after each use by rinsing with warm water; avoid abrasive cleaners on the outer surface.
Usage recommendations
Do not use the flask for carbonated beverages or for long-term storage of perishable liquids. Avoid placing the flask in a microwave or dishwasher. Inspect the lid seal regularly and replace if damaged to maintain insulation and prevent leaks.

## Specifications

### Features

| Feature | Value |
|---|---|
| Capacity | 0.5 L |
| Hot keeping time | 8 h |
| Cold keeping time | 12 h |
| Hand grip | No |
| Carrying handle(s) | No |
| Product colour | Black |
| Lid included | Yes |
| Double wall | Yes |
| Leakproof | Yes |
| Housing material | Plastic, Stainless steel |
| Pump dispenser | No |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.37 kg |
| Height | 225 mm |
| Width | 76 mm |
| Depth | 76 mm |

## FAQ

### How much does the Vacuum flask Rivacase 90311BK 0.5 L cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Rivacase products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Rivacase service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: capacity, hot keeping time, cold keeping time, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/2091063/58176989_large.webp