I was checking out ways to refill my Pulse BF without making a mess and ran across this
I know that there are several other squonk refill bottles out there but this is the first one I've seen that has the tube and it appears to make refills pretty seamless. Is there a downside to using this type of refill bottle that I don't know about?
Also, if anyone knows of a US site that sells these please share the info. Shipping from the UK is a bit salty

I know that there are several other squonk refill bottles out there but this is the first one I've seen that has the tube and it appears to make refills pretty seamless. Is there a downside to using this type of refill bottle that I don't know about?
Also, if anyone knows of a US site that sells these please share the info. Shipping from the UK is a bit salty