The SOFT FLASK's STRAW, compatible with WEIS' SOFT FLASK ULTRA 100K + SERIES™, reduces the suction effort because the anti-drip valve allows the liquid to come out only when it is bitten.
ULTRA 100K + SERIES™
Our exclusive line -designed with top technology- for elite athletes and long distance runners.
- Anti-drip bite valve
- Open/closed positions lock
- PVC-free, phthalates and BPA
TWO POSSIBILITIES OF USE
A. With the straw
B. Provides the possibility to disassemble the bulb and use the SOFT FLASK 500 ML with only the anti-drip bite valve.