The small travel kit from Nalgene comprises 4 different sized bottles (two 50ml, one 25ml & one 10-15ml), & 2 jars (two 25ml). All the containers have screw top lids. The containers are the usual high Nalgene standard & won't leak, crack or generally make a mess of your stuff. These containers are ideal for creams, medicines & fluids when travelling, when you don't want to take a whole large bottle.