The bottom part of plastic bottles can be perfectly used as snack bowls. Cut the bottom part of the bottle and use a clothes iron to remove any imperfection (only press the edge gently against the iron for some seconds). Use it to put small snacks as peanuts, olives and cheese.
Do you have kids at home or do you always need some toilet papers near you to clean something? A nice idea is making a toilet paper holder from a plastic bottle. It is only to cut the bottom part the same length as the paper roll and cut the upper part to be used as a cover. Remove the bottle´s nozzle and pull the paper from its hole. Simple and practical!