Product details: Source Convertube Hydration System Accessory Blue
The Convertube adapter converts drinking bottles into a drinking system with drinking tube and bite valve. The Convertube adapters are available with different adapters for different types of bottles. The kit includes four adapters, the drinking tube and the Sourze Helix drinking valve with protective cap.
• Fits Sigg, Nalgene (63mm), Evian and standard PET bottles.
• Length: 94 cm