Long Strip Hot Water Bag PVC Explosion-proof Rubber Warm Water Bag Girls Winter Bed Warmer 1. Material: PVC 2. Capacity: 500ml1000ml2000ml 3. Holding time: 500ml about 1-2h, 1000ml about 3-5h, 2000ml about 6-8h 4. Safe and environmentally friendly, add hot water to use, anti-scald and warm, explosion-proof and pressure-resistant 5. Thickened PVC, safe and waterproof, effectively slow down the temperature loss, insulation more durable 6. Watertight, strong sealing, no leakage, threaded sealing plug can prevent water leakage 7. Safety and explosion-proof, high thermal efficiency, safe to use, long life, even heat dissipation, easy to carry 8. Enlarged irrigation port, more convenient irrigation, uniform and slow heating, warm care all night long 9. Weight: 500ml about 115g, 1000ml about 370g, 2000ml about 400g 10. Size: 500ml about 23.8 x 9cm, 1000ml about 34.5 x 11.5cm, 2000ml about 46 x 14.5cm 11. Packing list: hot water bag x 1, cloth cover x 1 (500ml cloth cover color random delivery)