Re: dumb question...maybe?
understand the in a dishwasher there is a lot of heat and a lot of turbulence. Glass is dangerous as it can break if allowed to bounce at all. Also the vases would not get very clean singe the inside is the part to worry about. Brush and water man.
Regarding washable hoses, do not put them in the dishwasher. not only will the inside not get cleaned at all but the outside is often a decorative material that does not survive water well. On top of all that the high heat is almost guaranteed to melt the glue of the hose if not more. they are not made to have heat applied to them. Avoid this at all costs. You will ruin your hose.