1. It has two connected vertical glass bulbs allowing a regulated trickle of material from the top to the bottom. Once the to 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.
3. Also good gift for home or office decoration
4. Individual handcraft, classic look, timing accurate
Sand Timer Functions and Occasions:
* Home and Office decoration
* Ceremony or Party decoration
* Birthday gift, Holiday gift, Wedding gift
* Teaching, Education for kids
* Shower, Sauna timing
* Game, Exercise and Competitions
Customize Sand Timer Options:
* Logo and Patterns
* Different sand colors
* Customized Running Time
* Silkscreen printing, Pad printing etc..