Review on 12-Pack OZMI Plant Self-Watering Spikes With Slow Release Control Valve - Automatic Irrigation Equipment For Home And Vacation Plant Watering, Adjustable Drip System For Optimal Water Volume by Oliver Phelps

I tried different types of bottles- 2L soda bottle; it worked but it was too heavy, I plan to use the bigger bottles outside in the garden.- Wine bottle, not all wine bottles fit the dripper but those that fit were also too heavy for the dripper especially when the plant is a small house plant. It might work outside in the garden too.- Disposable water bottle worked ok but it was too flimsy. Other types of disposable soda bottles will work better so that it is easier to insert the dripper with out crushing the bottle and spilling water all over your floor. It works with patience and some tricking.