small bottle design, put at the corner of tank, this one is for small tank.
[attachmentid=291302][attachmentid=291304]

this one is i put for the habitrail cover
[attachmentid=291301][attachmentid=291305][attachmentid=291306]

this is the design for big bottle hanging on the corner of tank, a bit ugly design i think, but works for me.
see there is a like door like that in the lower part, that is to cover the lower part of the bottle from bite
coz b4 this i didnt put the cover up, then jus side cage only, end up they bite the lower part of bottles.
[attachmentid=291307][attachmentid=291310][attachmentid=291311]
[attachmentid=291308] >>> this design is the one that use on below picture

see the white masking tape there, is the place where my gerbs bite it, got one small hole.
so i put masking tape on it then use uhu gam to glue on the side on the masking tape.
coz i duwan put the gam on the hole direct coz sacred later the gam suck inside the bottle.
if u carefully see on top of the bottle, there still got cage protect it, that is extra one, not from the original design.
this is to prevent from biting the top of the bottle, b4 this i got put also, but then jus cover a bit, now put almost cover the whole top
[attachmentid=291314][attachmentid=291315]