Microwaveable pet hot water bottle (with dedicated cover) I bought this, but my dog showed absolutely no interest, so I stored it without using it. ● Shin Yuka Hot Body (Heat Storage Agent) - Contents: Polyethylene glycol ● Dedicated Cover Specifications - Color: Brown - Outer fabric: Polyester - Inner sponge: Polyurethane - Insulation: Polyester・Polyethylene terephthalate - Outer dimensions: 29cm long x 22cm wide x 2.5cm thick ● Instructions: Microwaveable, heat for about 3 minutes at 500W-600W, or about 2 minutes 30 seconds at 700W