---
product_id: 76701708
title: "Milton Optima 350 Thermosteel Hot and Cold Flask, 340 ml, Silver | ISI Certified | Vacuum Insulated | Rust Proof | Leak Proof | Tea | Coffee | Juice"
brand: "milton"
price: "€ 16.51"
currency: EUR
in_stock: true
category: "Milton"
url: https://www.desertcart.fi/products/76701708-milton-optima-350-thermosteel-hot-and-cold-flask-340-ml
store_origin: FI
region: Finland
---

# Leak-proof screw cap Retains heat with copper coating Keeps drinks cold for 11+ hrs Milton Optima 350 Thermosteel Hot and Cold Flask, 340 ml, Silver | ISI Certified | Vacuum Insulated | Rust Proof | Leak Proof | Tea | Coffee | Juice

**Brand:** milton
**Price:** € 16.51
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay hot, stay cool, stay ahead! ❄️

## Quick Answers

- **What is this?** Milton Optima 350 Thermosteel Hot and Cold Flask, 340 ml, Silver | ISI Certified | Vacuum Insulated | Rust Proof | Leak Proof | Tea | Coffee | Juice by milton
- **How much does it cost?** € 16.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/76701708-milton-optima-350-thermosteel-hot-and-cold-flask-340-ml)

## Best For

- milton enthusiasts

## Why This Product

- Trusted milton brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Premium durability:** Crafted from rust-proof 18/8 stainless steel, built to endure your busiest days without a scratch.
- • **Travel-ready design:** Slim, lightweight, and leak-proof—fits perfectly in your backpack or hand for seamless on-the-go hydration.
- • **All-day temperature lock:** Double-walled vacuum insulation keeps your coffee piping hot or your juice refreshingly cold for over 11 hours.
- • **Smart storage innovation:** Unique lid compartment for sugar cubes, medicines, or small essentials—because every detail counts.
- • **Certified quality assurance:** ISI certification guarantees top-tier safety, corrosion resistance, and a 1-year warranty for peace of mind.

## Overview

The Milton Optima 350 Thermosteel Flask is a 340 ml vacuum-insulated, double-walled stainless steel bottle designed to keep beverages hot or cold for over 11 hours. Featuring an inner copper coating for enhanced temperature retention, a leak-proof screw cap, and rust-resistant 18/8 steel construction, it is ISI certified and backed by a 1-year warranty. Its smart lid compartment adds convenience, making it the perfect companion for professionals on the move.

## Description

Milton Optima 350 Thermosteel Hot and Cold Flask, 340 ml, Silver | ISI Certified | Vacuum Insulated | Rust Proof | Leak Proof | Tea | Coffee | Juice : desertcart.in: Home & Kitchen

## Features

- Double walled insulated flask keeps your beverages hot or cold for long hours, Inner copper coating for better temperature retention
- It is made up of a durable 18/8 stainless steel, rust free, built to withstand the demands of everyday use
- ISI Certified: Our coffee mug is ISI certified, guaranteeing it meets the highest standards of quality, durability, corrosion resistance and 1 year warranty.
- The lid enables the mug to reduce the transfer of temperature keeps even more insulation. Special compartment for keeping sugar cubes, medicines and more. Ideal for carrying liquids such as sambar, curries, soup and dal
- This flask makes it perfect for carrying with you on any day-trip or anywhere you go. It is designed to be carried by hand or into the side compartments of your backpack for easy access.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00IA0WW0I |
| Age Range Description | Adult |
| Best Sellers Rank | #821 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #12 in Insulated Bottles |
| Brand | MILTON |
| Cap Type | Screw Cap |
| Colour | Silver |
| Country of Origin | China |
| Customer Reviews | 4.3 4.3 out of 5 stars (7,869) |
| Enclosure Material | Stainless Steel |
| Importer Contact Information | Hamilton Housewares Private Limited; 18002092151 SRV NO. 98/1/1, 98/1/2, 99/2/1, 100/1/1, Village Silli, UT of Dadar & Nagar Haveli, Silvassa-396230 |
| Included Components | 1 - Piece Optima Thermosteel Flask (350 ml) |
| Is Oven Safe | No |
| Is the item dishwasher safe? | No |
| Is the item microwaveable? | No |
| Item Dimensions W x H | 7.4W x 17.8H Centimeters |
| Item Type Name | thermos |
| Item Weight | 0.3 Kilograms |
| Manufacturer | Hamilton Housewares P. Ltd., SRV NO. 98/1/1, 98/1/2, 99/2/1, 100/1/1, Village Silli, UT of Dadar & Nagar Haveli, Silvassa-396230 |
| Manufacturer Contact Information | SRV NO. 98/1/1, 98/1/2, 99/2/1, 100/1/1, Village Silli, UT of Dadar & Nagar Haveli, Silvassa-396230 |
| Manufacturer Warranty Description | This product is under 1 year warranty from the date of retail purchase against any manufacturing defects in material and workmanship. The Warranty does not cover damages resulting from accidents, mishandling or tampering with the mechanism. Warranty valid against producing original bill endorsed by seller. |
| Model Name | OPTIMA MUG 350 ML |
| Number of Items | 1 |
| OutputCapacity | 340 Milliliters |
| Packer Contact Information | Hamilton Housewares Private Limited; 18002092151 SRV NO. 98/1/1, 98/1/2, 99/2/1, 100/1/1, Village Silli, UT of Dadar & Nagar Haveli, Silvassa-396230 |
| Pattern | flask |
| Product Care Instructions | Hand Wash Only |
| Product Features | Vacuum Insulated, Double Wall, Leakproof, Durable, Rust Resistant |
| Recommended Uses For Product | Coffee |
| Theme | No Theme |
| Unit Count | 1 Count |
| With Lid | Yes |

## Product Details

- **Brand:** MILTON
- **Capacity:** 340 Milliliters
- **Colour:** Silver
- **Recommended Uses For Product:** Coffee
- **Special Feature:** Vacuum Insulated, Double Wall, Leakproof, Durable, Rust Resistant

## Images

![Milton Optima 350 Thermosteel Hot and Cold Flask, 340 ml, Silver | ISI Certified | Vacuum Insulated | Rust Proof | Leak Proof | Tea | Coffee | Juice - Image 1](https://m.media-amazon.com/images/I/613kd4LyzGL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: What is grade of steel used inside ? Is it stainless steel if yes then what grade ?**
A: Its 18/8 steel grade. Rust free

**Q: How much gasket are their in Milton optima 350 thermosteel . 1or 2??**
A: 1

**Q: Why milk is turning pink in it?**
A: You my over cooked milk, observe one more time

**Q: What is the height of this bottle?**
A: 20 cm

## Frequently Bought Together

- Milton Thermosteel Optima 350 Double Wall Vacuum Insulated Flask, 350 ml | 12 oz | Hot and Cold for Long Hours, 18/8 Stainless Steel, Coffee Travel Mug Tumbler, Rust and Leak-Proof, BPA-Free Silver
- Milton Elfin Thermosteel Thermos Flask, 500 ml
- Milton Optima 350 Thermosteel Hot and Cold Flask, 350 ml, Silver | Vacuum Insulated | Rust Proof | Leak Proof | Tea | Coffee | Juice

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**Shop now:** [https://www.desertcart.fi/products/76701708-milton-optima-350-thermosteel-hot-and-cold-flask-340-ml](https://www.desertcart.fi/products/76701708-milton-optima-350-thermosteel-hot-and-cold-flask-340-ml)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-10-28*