I use jam jar and wipe the lid. Still have to renew it occasionally :wink:
BTW I purchased 5 litres of Cellulose Floor Sealer, over 5 years ago, for £22.64. The local paint spray company supplied 5 litres of Cellulose Thinner (top grade) for £9.79. Mixed both together as needed (50-50). I am still using it but it is almost finished. Will need to start again this year 