Silva Soft Flask 500 ml Grey

The Silva Soft Flask 500 ml is a featherlight hydration companion that compresses to a fraction of its size as you drink—perfect for long runs where every gram matters. Weighing only 33 grams, this collapsible bottle disappears into your vest pocket while delivering a reliable 500 ml supply of water.

Overview

Crafted from food-grade thermoplastic polyurethane (TPU), the Silva Soft Flask is built for endurance athletes who demand gear that can keep pace with their ambitions. Its flexible body shrinks as you consume to eliminate sloshing, and the high-flow bite valve makes quick hydration effortless—even without using your hands.

What stands out

• Collapsible design reduces volume as you drink, saving space
• Leak-proof self-sealing valve prevents spills during movement
• BPA-free and phthalate-free materials, safe for everyday use
• Volume markings help track your fluid intake
• Compatible with most hydration vests and belts

Technical details

• Capacity: 500 ml (0.5 L)
• Weight: 33 g (empty)
• Dimensions: approx. 250 x 80 x 30 mm
• Material: Thermoplastic polyurethane (TPU)
• Temperature range: -20°C to +40°C
• Cleaning: Hand wash recommended
• Use: Running, hiking, cycling, outdoor sports

Our verdict

If you are searching for a minimalist soft flask that can be ignored until the exact moment you need it, the Silva Soft Flask 500 ml is a dependable choice. Its tough yet flexible construction, combined with a secure seal and a comfortable mouthpiece, makes it an essential addition to any endurance kit.