Tough glass flasks ideal for safe and easy food transportation. A special range of glass vacuum flasks designed for outdoor use. Three sizes, each featuring a shock-proof glass liner, super-vacuum insulated for maximum efficiency. fitted in smart polished stainless-steel cool-to-touch outer cases, complete with clipped lids and carrying handles food flask, camping flask.
Easy to carry or transport a must for all outdoor activities made for the hunting, shooting, fishing and camping fraternities glass refill flasks easily fitted.
Ice Cube Test
Each flask was filled with ice-cubes, and left until half of the cubes remained. The test was carried out with the lid on.
|S1||3 days (72 hours)||50%|
|S2||4 days (96 hours)||50%|
|S3||6 days (144 hours)||50%|
* Remaining cubes strained through seive and volume measured.
Hot Liquid Test
Hot water, coffee, hot soup ; each flask 90% filled. The test was carried out with the lid on. Graph showing actual measured temperature of contents vs time.
||Glass inner size
(Internal Dia. x Depth)
|S1||85mm x 185mm||1 Litre|
|S2||105mm x 205mm||2 Litres|
|S3||150mm x 280mm||4.5 Litres (1 Gallon)|