If you're a minimalist, the Nikon Travelite Binoculars are the way to go. They're super light weight with decent glass in a Polycarbonate shell. These aren't Swarovski's, but for about $100, I've found them to be terrific when weight is a primary concern. I prefer the 8x25 for the lightest weight. THEY ARE NOT WATERPROOF, so be forewarned.
If size and weight don't matter and high quality is important, skip these and invest in a better pair.