I've used both cleaned anti-freeze and bleach bottles wired close to the top of cedar trees for years.Tie to the main trunk and use heavy concrete blocks Tied to the base of the cedar. On pond bottoms slopes they tend to remain in place and upright. Buckets with concrete would tip on uneven surfaces and tree would be on its side. Kids running a gas motor on a boat caused many of my buckets and cross braced wood to fall over.
