500ml Collapsible Silicone Drinking Bottle

Capacity: 500ml. Weight: Approx. 115g (empty). Expanded dimensions: ~19cm × 7cm (H × Ø); collapsed thickness: ~2.3cm. Primary body material: FDA-compliant food-grade liquid silicone rubber (LSR); cap and base: polypropylene (PP), BPA-free and impact-resistant. Surface finish is smooth matte, resistant to fingerprint smudges and light abrasion. The silicone exhibits excellent elasticity (Shore A 30–35 hardness), enabling over 5,000 fold/unfold cycles without permanent deformation or micro-tearing — validated through accelerated lifecycle testing. Cap sealing mechanism uses dual-contact points: outer thread engagement + inner silicone gasket compression, ensuring reliability across temperature ranges (-20°C to 100°C). Ideal for multi-day hikes where pack weight matters, airport security lanes where fast-access hydration is essential, school bags where durability against drops is expected, and family picnics where child-safe, unbreakable materials are non-negotiable. Performs reliably whether stored full or empty, hot or cold — no warping, cracking or seal degradation observed in real-world UK climate conditions (including damp storage in car boots or garden sheds).