Modern Living

4.9/5 ⭐ +10,000 Happy Customers

Discover the Ready-to-Wear Hot-Water Bottle by Foundly

Designed to keep you warm and cozy during your daily routines.

As seen in

Feature über Foundly Wärmflasche im Magazin 'Freundin'
Foundly Wärmflasche in der Design-Edition des Magazins 'Süddeutsche Zeitung Magazin'
Feature über Foundly Wärmflasche im Magazin 'Emotion'
Press

Join our IG community

 Foundly Wärmflasche im Design Setting
Bloggerin zeigt Foundly Wärmflasche im Interior Setting
Foundly Wärmflasche im Couch Magazin
Foundly Wärmflasche in Greige
Foundly im Süddeutsche Zeitung Magazin
Follow us

Your Questions, Answered

Can a Hot-Water Bottle ease pain?

Studies have proven that heat in general has a similar effect to a painkiller, effectively “deactivating” pain at a molecular level. In this way, completely naturally and without any chemicals, heat shuts down the regular pain response and helps with issues such as menstrual pain, neck tension, and abdominal cramps, and even diseases such as endometriosis or Crohn’s disease. However, hot-water bottles by themselves do not ease pain. UCB does not claim the capability of a medical device. In case of doubt, consult your doctor or pharmacist.

Are there any scientifically proven results about the benefits of heat?

Yes. The fact that heat relieves abdominal pain, such as colic or menstrual pain, has been scientifically proven by a UCL (University College London) scientist. Dr. Brian King, of the UCL Department of Physiology, led the research that found the molecular basis for the long-standing theory that heat provides relief from internal pains. For more information visit: Uniersity College London

How do you ensure the safety and durability of your hot water bottles?

Our Hot-Water Bottle is developed according to international safety standards, including the British Safety Standard (BS 1970:2012), ensuring durability, leak protection, and heat resistance. The high-quality material undergoes rigorous testing for elasticity, pressure resistance, and aging to prevent cracks or deformation. A secure closure system and an extra-large funnel make filling safer and easier, minimizing the risk of spills. Certified, Foundly prioritizes both comfort and safety—so you can enjoy warmth with peace of mind.

Which belt size is right for me?

Currently, we have 2 belt sizes available in our shop. Size 1 has a length of 110cm and is designed for clothing sizes S/M. Size 2 has a length of 125cm and is designed for clothing sizes M/L.

How does Foundly support fair trade and sustainable rubber farming?

With every Urban Cross Bottle sold, a fair trade premium directly supports rubber tappers and plantation farmers, ensuring fair wages, better working conditions, and sustainable farming practices.

As a proud partner of Fair Rubber e.V. (fairrubber.org), Foundly is committed to ethical sourcing. The Fair Rubber certification guarantees that the natural rubber used in our products is harvested under socially and environmentally responsible conditions. This initiative helps fund healthcare, education, and community development projects for rubber-producing communities.

By choosing Foundly, you're not just investing in high-quality, sustainable warmth—you're actively supporting fair trade and a better future for rubber farmers worldwide

What makes the Foundly Hot-Water Bottle unique?

The Foundly Hot-Water Bottle is the upgraded version of the conventional Hot-water bottle. Ergonomically shaped (including massage riffles) and designed to keep you warm and cosy during your daily routines – whether it’s at the office, during outdoor activities or while having a relaxing rest at home. In combination with our comfy, removable belt, our hot-water bottle can be worn in multiple ways: around your neck and shoulders, around your upper or lower back or around your belly

Join the comfort club today

4x Sold Out – Back for a Hot Second! Join 10,000+ Happy Customers