What does Christina's mystery item have to do with this cake?

Can the fair-goers in Brighton guess what it is?

12 June 2020

3 minutes

This clip is from

Bargain Hunt—Series 56, Brighton 18

The machines that helped to shape the British countryside.—Series 73, Down on the Farm
Duration: 04:40
The Victorian practical joker who pranked the townspeople of Stafford.—Series 73, Stafford 13
Duration: 04:22
Who was the creator behind this iconic little bear?—Series 73, Detling 5
Duration: 05:03
Leaves on the line? Not a problem for the railway chemists or 'stinks'.—Series 73, Uttoxeter 1
Duration: 05:03