Georgette Douwma / Painted Frogfish (Antennarius pictus), juvenile perched on bottle top. Rinca, Komodo National Park, Indonesia.

Steven David Miller / Satin bowerbird (Ptilonorhynchus violaceus) male with blue bottle top in beak, tending to bower to attract female. Ulladulla, New South Wales, Australia. July.

David Tipling / Satin Bowerbird (Ptilonorhynchus violaceus) male collecting blue bottle top for bower, Lamington NP, Queensland, Australia, September

Pat Tuson / Two full glass milk bottles standing on doorstep, one green top and one silver, Highbury, London Borough of Islington, England UK

Chien Lee / Blue Bottle Fly (Calliphoridae) emerging from a Rafflesia (Rafflesia tuan-mudae) flower with pollen stuck to its back, Gunung Braang, Padawan, Malaysia

Tom Gilks / Close-up of Coke bottle top, prepared by artisan before crafting, Dakar, Senegal, 2008

Konrad Wothe / Bottlenose Dolphin (Tursiops truncatus) mother and baby swimming just below the surface, Caribbean

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) pod, Galapagos Islands, Ecuador

Kim Taylor / Blue tit {Parus caeruleus} drinking cream from milk bottle top. UK.

Kim Taylor / Blue tits (Parus caeruleus) competing for cream at the top of a milk bottle. Surrey, England, UK, August. Digital composite

Suzi Eszterhas / Mule Deer (Odocoileus hemionus) six week old orphaned fawns bottle feeding, Kindred Spirits Fawn Rescue, Loomis, California

Suzi Eszterhas / Mule Deer (Odocoileus hemionus) six week old orphaned fawns bottle feeding, Kindred Spirits Fawn Rescue, Loomis, California