The bright yellow background features a flutter of blue Ulysses butterflies, with their distinctive teardrop wings, framed by botanical illustrations of lemon plants - its beautiful design is based on original artwork held in the Museum's Library and Archives.

Papilio ulysses is a type of large swallowtail pollinator who flutters majestically around tropical rainforests in Australia, Indonesia, Papua New Guinea and the Solomon Islands. It's also known as the blue emperor due to the colour of its iridescent wings which can reach 14 centimetres across.

• 500ml
• suitable for hot or cold drinks
• screw-top
• double-wall insulated
• W6.7cm x H27.5cm
• 298g
• made from stainless steel, with a silicone seal