Has anyone used this and can you recommend a good brand? I do have a good strapless bra but there are a couple of things that I'd like to wear bra-less but whilst they're not huge they could do with a lift! I've seen stick-on silicone things that lift the boobs but it would be while we're on holiday so I'm worried that the heat/sweat would cause it to slip off!! Would tape be any more effective?