My four month old daughter has been teething for the past month or so. She puts everything she can get her hands on straight in her mouth and she likes to chew on her fist to ease the discomfort. I had bought some traditional water filled teethers but found them to be too bulky for her to fit in her mouth and they didn't stay cold for long.

I saw these Nuby icy bite keys in Sainsbury's baby aisle for £4.50.

The keys come attached to a blue and white spotted ring which has a rubbery feel to it. There is a red and white 'Nuby' logo attached too. The keys are all differently shaped there is a square, a triangle and a circle top piece. The actual 'key' part is the same on each key. The top of each key is plastic with rubber pieces on the side. The 'icy' part of the key is shaped like the real thing, it also features different textures.

Each key contains something Nuby can PurlIce it is said to stay cooler for longer than traditional water filled teethers. The keys are also BPA free.

The keys are suitable for 3+ months.

You can squish the end of the keys and the gel moves around they feel soft enough not to hurt gums but firm enough to provide something substancial to chew on.

I put these in the fridge for only half hour before giving them to my daughter. She immediately began chomping away and they seemed to ease her discomfort. They stayed cool for a good hour or so too. When my daughter isn't munching on these she seems to like to rattle them around they actually make a nice noise when they are shook. She also likes to wear them on her wrist as well as throw them on the floor! You aren't able to steam steralise these, it is recommended you wash them in warm soapy water then rinse with clean water. As mine have had several trips on the floor I also put them in Milton just to make sure they were clean. It hasn't damaged the keys in any way.

My daughter has been using these for about a week now and I have noticed that I can now see her teeth cutting through the gum. I am convinced this is because of the texture of the keys.

I would recommend these in place of traditional teethers. Having tried both these are far superior and they also make a nice toy for your little one.