I brought melamine plates and bowls quite a few years ago when we brought our first van and I am still using them BUT you can't put them in the microwave. I am thinking of buying some Corelle like we use in the house to put in the van. I don't need the mugs so may look at buying the pieces seperately when BigW have them on special (they do quite often, it is just a matter of keeping a look out). Not as light as the melamine but still very light.
Glass is a given too for wine!!!!!!! I have made bubble wrap sleeves for my wine glasses, both red/white and champagne, using a cheap $2 heat sealer and cut bubble wrap to size, making it longer so you can tuck the end into the glass. Slip in the glass and they are safe. I have not had a broken glass whilst in the "sleeve", once out that has been another matter!! We also have a camper trailer which the glasses have travelled in the back of and no problems in the "sleeves". I also have a back up set of 4 still in its original box and they also travel very nicely in that.
Also have the non-slip matting on the bottom of all cupboards.