Where can I buy a hollow perspex salad bowl filled with dried flowers?

Try the pound shop.

Where can I buy a hollow perspex salad bowl filled with dried flowers?
Do you mean flowers inside the perspex? I saw these, think it was Debenhams, not sure, a while ago, probably wrong time of year.





I also saw a program on TV where they made them, don't remember what the program was though, looked complicated.





You can make them with ice, using 2 bowls, obviously only able to use it for a short time before its a pile of petals and water.