In Sweden, as well as in Denmark, one can buy a cake - made of mix of crushed cookies, butter, cocoa, and liqueur - shaped like a small rod. In Denmark these are either coated with green marzipan or simply dipped in chocolate. The latter is probably the more sensible with regard to the Danish name:
Træstammer = 'logs'. Until very recently we only saw the green variety in Sweden. They are sold under the name
punschrullar = 'punsch-rolls', but for questionable reasons they are better known as
dammsugare = 'vacuum cleaners'.
On the occasion of the many parties of the season (the National day,
the wedding of the princess-heir, the many graduation parties ... or even midsummer!?) an alternate version in yellow and screeching blue is also available.

It might just be those of us who grew up with the green ones that find the blue-and-yellow ones to look significantly more poisonous - or.. ?