The lightweight and flexible tube for KADVA Flowbie soft flasks is a practical component of the hydration system, designed for intensive use in the field. It facilitates access to fluids on the move, proving useful during running, trekking, and longer outdoor expeditions.
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Softflasks tube KADVA Flowbie blue (KDV-NAB5C026-BL)
Thanks to the use of several modern materials and precise fitting to soft bottles (softflasks), the KADVA Flowbie ensures reliable performance in all outdoor conditions. Its simple yet sturdy design allows for easy attachment to running backpacks and vests with a compatible system.
Advanced materials – durability and safety
The tube construction uses five types of materials, each serving a specific function: TPU (thermoplastic polyurethane), PP (polypropylene), PU (polyurethane), PE (polyethylene), and silicone. TPU provides flexibility and abrasion resistance, which is important for intensive use and frequent bending. Polypropylene is a material resistant to chemical effects and provides good structural stiffness. PU and PE contribute to the tube’s strength and low weight, while the silicone mouthpiece guarantees comfortable drinking and taste neutrality – without plastic affecting the water.
Hygiene and ease of cleaning
The materials used are resistant to bacterial buildup and easy to keep clean. After each use, the tube can be quickly rinsed, and thanks to smooth inner walls, dirt and residue do not accumulate inside. The silicone mouthpiece can also be easily removed and washed separately, allowing for a high level of hygiene even with frequent use. The design allows for flat drying or hanging without risk of deformation.
Low weight
The use of lightweight materials such as polyethylene and polyurethane minimizes the tube’s weight without sacrificing durability and flexibility.
Ease of cleaning
The inner surface of the tube and the removable mouthpiece allow for quick and effective washing, ensuring full hygiene for everyday use.
Compactness and low weight
Despite using five different components, the Flowbie tube remains very light and does not burden the hydration system. Its compact size means that once detached, it can be easily stored in a pocket or tucked into a small accessory pouch. This also makes it suitable for emergency situations as a spare element – ready to use at any time without taking up extra space in your gear.
Product Details

Flexible construction
The tube made of TPU and PU maintains excellent flexibility, making it easy to route through the straps or pockets of a running vest.

Silicone mouthpiece
The soft and hygienic mouthpiece ensures comfortable drinking without leaking and does not alter the taste of the drink – ideal for frequent use outdoors.
At Kadva, we focus on ensuring that every trip to the mountains, camping, or by the water runs smoothly and allows you to fully enjoy your time in nature. Our offer primarily includes functional and high-quality equipment and travel accessories that will make organizing a camping trip, tent outing, or family beach day easier and more enjoyable. We prioritize practicality, comfort, and durability of our products to meet the demands of even the most discerning outdoor enthusiasts.
In our assortment, you will find various models of deck chairs — both garden ones, perfect for relaxing in your green corner, and travel ones, which are ideal for trips and camping. Our camping furniture, designed with mobility and comfort in mind, is an essential part of every campsite setup. Our beach tents, which provide shade and privacy on hot summer days, guarantee a successful rest.
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Softflasks tube KADVA Flowbie blue
Softflasks tube KADVA Flowbie blue
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