Cut them up. Animals may get their head caught in certain containers. Rinse out all containers. Glass bottles and jars can shatter and splinter endangering animals coming into contact with them. Wash out and recycle.
Cans can cut and catch animals.
Crush your cans flat and recycle wherever possible. Launched balloons landing in water may be mistaken for food on which the animal may choke and die. Don't take part in balloon races and other events involving the release of balloons. Amongst the worst offenders of litter in and around waterways are anglers. A quick walk along any stretch of water where people fish regularly will soon reveal lots of litter and lost or simply discarded fishing tackle.