I was confused, too. I think the problem is that bubble in this sense (as something that envelopes you) is crossing cognitive wires with Dotcom Bubble 2.0 (market bubble), esp. here on HN.

Perhaps a curtain metaphor, a la The Iron Curtain: Velvet Curtain, Mirrored Curtain, Circular Curtain, Silk Curtain?

Or a cocoon: Filter Cocoons? Digital Cocoons?