I used it once, and then stored it. It's still usable. Please refer to the photos for some minor stains. Please consider this item as used. I have two available, so please let me know if you'd like one. High-performance soft hot water bottle made with wetsuit material Made with wetsuit material, it can be used directly without a cover, and is a soft hot water bottle with a pleasant feel against the skin. It has high insulation and heat retention, keeping the warmth at about 40°C even after 6 hours. (*1) *1) Measured the surface temperature of the top of the hot water bottle inside a sleeping bag (tested at room temperature of 10°C) ■Total weight: (approx.) 160g ■Size: (approx.) 23cm long x 16cm wide x 8cm high ■Capacity: (approx.) 1L ■Components: Body, funnel, storage bag ■Main materials: [Body] Chloroprene rubber, nylon jersey [Cap] ABS resin [Cap receiver] PET Performance/Features: ・Soft hot water bottle with gentle warmth ・Soft and warm due to the use of wetsuit material ・Can be filled with boiling hot water. ・Comes with a funnel for safely pouring hot water ・Comes with a storage bag for the hot water bottle and funnel ・Made in Japan