cheap make sand timer

plastic tube
printing logo on caps
different color and size
accurate timing: 1-5minutes

NAME:

sandglass, hourglass, plastic sandglass, plastic hourglass,

sand timer,shower timer.sandglass timer,hourglass timer

1-30 minutes sandglass, sand clock,sandy clock,hour glass,sand glass

FEATURE:

1.It has two connected vertical glass bulbs allowing a regulated trickle of material from the top

to the bottom.Once the top bulb is empty,it can be inverted to being timing again.

2.Factors affecting the time include the amount of sand,the bulb size,the neck width,and the sand quality.