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These fluid eyeshadows by Chanel are dual phase - a layer of pigment/colour and a layer of clear liquid. It comes in a small square shaped frosted glass bottle that allows you to see the amount of product you have left without any fingerprints being left on it. The cap is black and has the Chanel logo in white on the top while the applicator is an angled sponge tip.
To use, shake the bottle and apply with the applicator. I find that using it alone on the lid without any base seems to work the best; when I applied it over UDPP, the fluid shadow went on patchily and unevenly. I usually apply with the applicator and smoothe it out with either my finger or a flat paddle shaped brush.
Rivage appears silvery with a hint of blue in the tube, but that is mostly due to the frosted glass container, I think. When swatched, it is actually a very shimmery silvered gun-metal grey. I think this would work better at night if worn alone because it is very shimmery and slightly glittery. However, you can also use this as a base colour of sorts and brush a powder shadow or pigment over a layer of Rivage. NARS Night Fairy (a lavender with lots of gold shimmer) is particularly gorgeous over Rivage - the end colour was a duochrome silvered-grey with none of the glitter evident at all. This would also work very well with other silvers and blacks for a smoky eye. :) I didn't notice any creasing without a base, though I don't have very oily lids and only wore it out for a few hours. I also had no eye irritation at all and I usually have very sensitive eyes and wear contact lenses.
All in all, I'm very pleased with the product - great quality, decent amount of product (6g/ 0.2 fl oz) and although the price is a little steep, it IS Chanel and you require very little product each time round so it will last a long time. I'd definitely repurchase and am looking for a more day-friendly shade!