one or more conventional friction inducing materials and or one or more friction inducing surface configurations and has a size and shape that will generate enough static friction between the anchor component 20 and the deck 30 at least while the friction means 110 is pressed against the deck 30 by the weight of the container 100 filled with a liquid such as water to prevent lateral movement of the anchor component 20 during normal use e g to prevent such movement due to waves in the water and animals using the apparatus to escape the water under conditions in which the particular apparatus was designed to be used it is expected that those skilled in the art could in view of the disclosures herein readily anticipate and design an embodiment of the invention to accommodate a range of environmental conditions u2014 such as wave conditions and a range of manners of use u2014 such as the ways in which the designed for animals will attempt to use it normal use is further discussed below potential conventional friction inducing materials include such materials as rubber soft plastic and gum like materials potential friction inducing surface configurations include such configurations as roughness grooves protrusions pits and suction cups of course alternatively the friction means 110 could be made as an integral part of the container 100 bottom and as such may not necessarily be visually distinct from it in the embodiment shown in fig1 the anchor component 20 is seen to also have a fill stem cap 120 for removably covering preferably being threadable on and off a fill stem 130 which provides access to a fill opening 300 for liquid to be inserted.