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FLASKE is an eco-conscious company. We specialise in reusable, plastic-free bottles and food storage containers. Our products help people to reduce waste at home and on the go. All FLASKE products are shipped in recyclable packaging and 10% of profits are donated to The Plastic Soup Foundation.

Based in Amsterdam, the Plastic Soup Foundation is a single-issue environmental organisation with a clear mission statement; no plastic in our bodies or our waters. Founded in 2011 by Maria Westerbos, the organisation runs environmental campaigns that raise awareness of the health and environmental problems associated with plastics.

FLASKE bottles, coffee mugs, travel tumblers, and food pots are made of high-quality, BPA-free, 18/8 food-grade stainless steel.

FLASKE stainless steel bottles, mugs, tumblers and food pots are not dishwasher safe. Putting your FLASKE in the dishwasher may damage the outer coating.

We recommend cleaning the FLASKE with warm water and dish soap after each use and storing it with the cap off. A bamboo bottle brush will help you keep your FLASKE as clean as the day you got it! To deep clean a water bottle, use bicarbonate soda, vinegar, or bleach diluted in water.

Clean your reusable water bottle, travel tumbler, coffee mug, and food pot often. Ideally, you should wash your FLASKE containers daily, or after each use if filled with a beverage other than water. Clean your food flask with warm water and dish soap after every use.

If the FLASKE containers are empty, they will pass airport security without any problem. In some airports, you can refill your FLASKE from a drinking fountain after passing security.

Engraved and personalized bottles, coffee mugs and food pots can not be returned to our warehouse because we can not sell this items anymore.

Send us an email ASAP to This way we can immediately change your address to the correct one before your order leaves our warehouse. If we receive your adjustment too late (so when your order has been processed), or you find out when delivery attempts fail, you will be responsible for covering the shipping cost to the correct address. If this leads you to want to cancel your order, please be aware that that is only possible when products are not personalised.


FLASKE’s thermally insulated water bottle is designed to keep drinks hot for up to 12 hours and cold for up to 24 hours. It’s leak-free and condensation-free. You can use your FLASKE reusable water bottle for anything from hot chocolate to iced tea and coffee to cocktails.

FLASKE keeps drinks cold for 24 hours and warms for 12 hours. For the best results, pre-heat your bottle with boiling water, or pre-cool with iced water. Wait for 1-2 minutes then pour out the water and fill with the drink of your choice.

FLASKE has a slim design that comes in four sizes; 260ml, 500ml, 750ml, 1l. The 260ml and 500ml bottles fit most car cup holders and bicycle bottle holders as well as backpack side pockets and day bags. Bottle sizes and weight: 260 ml: 0.21 kg, 20.6 cm x 6.4 cm. 500 ml: 0.30 kg, 26 cm x 7 cm. 750 ml: 0.42 kg, 30 cm x 7.6 cm. 1 l: 0.45 kg, 34 x 8.2 cm.

Water bottles made from 18/8 food-grade stainless steel are the safest metal water bottles to drink from. Stainless steel is a non-toxic material that doesn’t require a liner. Unlike plastic, it doesn’t leach chemicals even if the bottle becomes dented or if hot liquids are put inside. It’s also very strong and safer to travel with than glass bottles.

Reusable water bottles are good for the environment because they minimise single-use plastic waste. High-quality reusable water bottles are designed to last for years. If everyone ditches single-use plastic bottles and buys just one reusable bottle, less natural resources would be needed because fewer bottles will need to be produced.

All bottles ordered in size 260ml, 500ml, 750ml from February 2021 will fit a sports lid. Bottles purchased prior to don’t all fit the sports lids and these can’t be returned (see below link). Bear in mind that for the 750ml the actual straw won’t reach to the bottom so a little layer of water will be left. This is because the sports lid is initially designed for 260ml & 500ml bottles. We don’t sell separate straws for the sports lid. This means that for example: One sports lid fits both 500ml & 750ml but not 260ml & 500ml/750ml. You will require two sports lids for the latter as the straw needs to be cut to fit the 260ml. For more information:


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