Where can I get decent clear glass baubles?

[oysterpots]

Preferably at a reasonable price. Online even better!

If you're in London, I saw some gorgeous ones yesterday in Muswell Hill, shop next door to Starbucks but I don't know the name of it.

Alas am in the sticks. Well, Bristol.

I got some at a local garden centre - they had a range of sizes, starting at under £1 iirc...