A friend received this baby pack from our local Sure Start center (they're a UK children's initiative for those who don't know). It contained various, obviously useful items for people with a baby and these (pictured). We don't know what they are but we're assuming they're some kind of baby proofing device? Does anyone recognize what they are? There's no information or instructions in the pack.

Maternity Pack, Safety Pack, Baby Book Start, Book Start Plus, Breast Feeding, Dental Pack Baby, Dental Pack Toddler. Also are they solid/rigid, or are they flexible/rubbery? – superphonic Oct 29 '14 at 10:00