If it is absolutely closed off in the end, no you won't, but it might be smart to ask the lovehoney live-chat customer service just in case. They will know the details for the specific one -- if it's "tunnelled" or have any seams or anything that could cause a leak =)
If you blow into the open end, and it inflates(like a rubber glove) then yes no holes, so in theory would work, but over time may fail, so I would NOT chance it?