If you're looking to tone up your stomach one of my favourite products at the moment is Bliss fatgirl six pack (£34). It contains caffeine, oat kernel extract, manilkara tree extract (which is rich in latex), menthol and botanical extracts to help firm up the tummy area and improve skin's texture. But the thing I love most is the special applicator. The tube has a built-in nubbed applicator that massages your skin, helping to improve circulation.
.To use it you simply press the applicator onto your skin to release the gel then start working it around the skin in circular motions. The firming lotion itself is a clear gel that feels very fresh and dries quickly. It immediately improves the tone and texture of my skin and makes it feel firm all day. I use it twice a day - once in the morning and once before going to bed. Obviously using this daily won't produce results in itself - it has to be combined with exercise - but using this in conjunction with going to the gym a couple of times a week has made my stomach feel a lot firmer.
My only criticism is that the applicator can get a bit clogged up with gel and can go sticky after using it. This may not be a problem for some people but I prefer to keep it clean so I usually have to wipe it afterwards which isn't good when I'm in a hurry. I know a lot of people aren't too keen on products by bliss as the names can be a bit controversial but I think they're just a bit of fun and shouldn't be taken too seriously. I never used to use firming lotions but I now use this one everyday and love it. Admittedly it is a bit pricey but I think it's worth it. For a cheaper alternative I think Nip + Fab Tummy Fix Gel is equally as good and slightly cheaper!