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.

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.

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: UCL Research

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.

Thank you for your purchase. Your Urban Cross Bottle and/or Wearables are currently being manufactured and will be delivered as soon as stocked. We will keep you in the loop. Follow us also on Instagram @foundly_studio to stay updated. If you have any questions, contact us via support@foundly-business.com. We will get back to you as soon as possible.
Please note also the Terms and Conditions.

Please do not fill your Urban Cross Bottle from a tap or other domestic water system as this can prematurely degrade the product. After usage, allow your bottle to air dry completely with the lid open. This will help to avoid unwanted moisture build-up. Store your bottle with the lid off and keep it in a cool, dry, dark place. Avoid contact with hot surfaces, oil, grease, direct sunlight, pointed and sharp objects. Do not allow anything to rest on the bottle. It is advisable to replace your rubber bottle every 2 years.

Thoughtfully designed to be lightweight and Weighing just 200g when empty, the Urban Cross Bottle (UCB) is designed for effortless wear and daily comfort. With a capacity of 800ml, it is recommended to be filled to a maximum of two-thirds to ensure safe handling and prevent burns.Compared to traditional hot water bottles, the UCB is lighter, slimmer, and ergonomically designed, making it more wearable and practical. While standard bottles typically hold 1–2 liters and are bulkier (approx. 320mm x 200mm), the UCB’s sleek dimensions (L: 380mm, W: 105mm, Thickness: 1.7mm) allow for targeted warmth without excess weight.Made from 100% certified natural rubber, it not only prioritizes comfort but also sustainability. Whether at home or on the go, the UCB offers a modern take on warmth—wearable, lightweight, and thoughtfully designed.

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.

When filling your hot-water bottle, do not use boiling water. Fill it to a maximum of two-thirds capacity, expel air, and check for leaks.

This recommendation is for your protection as hot water can cause burns. Doctors recommend 40-50 degrees Celsius as the ideal water temperature.

Natural rubber is produced by the rubber tree (Hevea brasiliensis). It’s biodegradable and has a lower environmental impact than synthetic rubber. Foundly uses natural rubber in its products to ensure the highest quality and sustainability standards.

Shipping within Germany: €2.90. Free for orders over €75. Shipping to the EU: €12.90, free for orders over €125. Worldwide: €24.90, free for orders over €200.

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Our customer service is available Monday to Friday from 9:00 am to 5:00 pm. Email us at support@foundly-studio.com.